Relocation to Germany advice.

Without having a high level of German you are honestly likely wasting your time except in some very niche jobs. Good English is fine to have, even expected for some jobs, but in addition to German, rarely as an alternative. And inquiring about jobs while on a tourist visa is kind of a gray area. Not illegal per se but it can create problems. There is such a thing as a job seeker visa but difficult to get. It gives one the possiblitly to find a job and start right away without having to return home and applying for a work visa.

But when one gets interviews or comes asking about a job then it is expected that they have the legal right to work. Employers might feel you are wasting their time or they and/or immigration authorities might assume you are trying to go around the rules. So it would be critical to say upfront that you are not there with the right to work, just trying to get a feel for the possibilities to try to immigrate and work in the future. The question then is if an employer wants to bother since you aren't a current candidate.

I think a trip to a country to get a feel for it is a great idea before putting a lot of effort into immigrating. But to find jobs that employers would be wiling to and able to take the extra effort, risk and cost to recruit someone from outside of the EU can usually be found best online. One can research the industry and likely companies and contact them. And there are multiple international job websites. Even a job seeker visa, if one can get it, is questionable. Usually it is a frustrating waste of money as the additional opportunities that one would find compared to what is online is usually nominal.

Either through a work visa or a job seeker visa, one really has to have highly demanded skills that are locally in short supply. And again, language is often critical.