Hi ciciks
Do not let naysayers spoil your dream. If you set the intent in motion, you will find a way. Just be certain to stay out of trouble and to do things by the book. Also, tone down your [public] enthusiasm a few notches so you are not targeted by unscrupulous types who may seek to mislead and exploit you. It's OK to be positive, just be discreet - and persistent. And be prepared to work on this goal for years - it may take some time to achieve it.
Of course, you will need to find a legal way to enter Australia and to stay for a reasonable amount of time. Given your current status as a student, I would strongly recommend you focus on applying to one of Australia's major universities (Sydney or Melbourne) in a program that you feel you are strongest and most interested in. You will need to apply formally to the university and be accepted. You should study the admissions process for whatever uni and college (program) you are interested in, and then make a plan how to accomplish this. If you can make contact with the admissions office at the university and the academic program, and if you have strong academic credentials and can score well on whatever admissions or standardised tests they require, then they will probably be willing to assist you.
You mentioned several skill areas which are fine as hobbies (Blender 3D, website creation, etc.) which might be skills you can capitalise on AFTER you are in country legally. But they are, for the most part, trade skills in IT. You could join a meet-up group and meet other enthusiasts and possibly make contacts that will lead to employment or other opportunities. But you will need to play it cool and dont appear to be desperate. Also, you could attempt to study Computer Science or Information Technology at university, but those programs are invariably overcrowded and very competitive to get into. Still, if you think you can do it, maybe you should give it a go. As for language skills, these are always desirable - but not generally as a primary occupation. There will be times in your life as you mature where bi- or tri-lingualism will be a huge asset. But very few companies are hiring translators, although there is at least one Australian company advertising positions on the expat-blog for just that. As someone who is older and has studied languages and lived in several foreign countries, I can assure you that you will need formal accreditation to do document translation or foreign language instruction professionally.
Finally, all these options will require several steps. You should familiarise yourself with the Australian Immigration website as well to find a visa category that you could apply for. If coming to Australia as a student AND applying to a university, they should be willing and able to assist if you are accepted. I would not waste money on immigration counsellors unless you are unable to apply on your own AND are unable to get qualified assistance from your sponsoring institution.
So, here are two basic plans:
Option 1: International Student
Decide what field of study you are best in and most likely to succeed. This needs to be a recognised academic discipline.
Pick 2-3 universities where you would like to study. Go to their websites and read and absorb all the requirements for international students.
Contact the universities AFTER you are very familiar with the above information. Do not call them and ask for general help. Instead, contact them and request assistance in applying for admission to the [as an example] Undergraduate Program in Computer Science. Have as many of the answers already figured out, otherwise they may not waste their time if you sound unprepared. Be cool and professional.
Finally, save [lots of] money. You should have at least enough saved to pay for your trip to Australia (and return, if something goes wrong), plus, ideally, one years living expenses (one room student accommodations) AND one years tuition and fees. For international students, that will be a lot of money - possibly $60k or more depending on the institution. You may be able to work as a student, but dont expect to earn more than pocket change for your first few years until you are more advanced.
Option 2: Permanent Residence
This option is most desirable, but harder to do unless you have recognised skills and degrees in high-demand fields. As a young person, this may be out of reach until you earn a college degree in an important field. Australia, like many countries, has a points-based system. You will need to look at the skilled migrant category and see which fields and qualifications will enable you to achieve this. Generally speaking, if you have a bachelors degree or higher in any engineering field, you will, in all likelihood, be accepted, but check the Immigration website to make sure. Also, the degree-granting institution needs to be recognised and accepted.
Other options: Not likely. While it is possible that you could come to Australia on a work visa, your chances are very poor, and you will, in all likelihood, fail. Be realistic and do not fall prey to false hopes and dreams.
Best of luck to you.