Brit moving Indonesia to Ireland with Indonesian partner and children.

Hi folks. I'm new to this forum but am hoping someone can clarify my position which is as follows :

I am a British expat who has lived in Indonesia for over four years with my partner and her two children, who are all Indonesian. All three are fluent in English. We are hoping to move permanently to Ireland as soon as possible. I understand from the Citizens Information website that as a British subject I have pretty much unrestricted access in moving permanently to Ireland. My confusion surrounds how best to bring my family with me. We are not yet married as it is illegal to marry across religions here in Indonesia, and anyway, my divorce is some months off being completed. It would seem appropriate to get married in Ireland as we both really want to make that commitment as soon as we can. I am very confident that we can prove our ongoing relationship to anybody's satisfaction.

Ideally we want to move to Ireland as soon as possible - i.e. in the next few months - as the education of our children is paramount and this timing would fit well with their ages.

I am aged 55 and retired from work with a modest pension income. I intend to return to work in Ireland in some capacity in order to supplement that income. I also have a lump sum of funds available to act as cushion in case of need.

Am I right in understanding that if I come on my own to Ireland my family could join me shortly afterwards on 3 month tourist visas and then make applications to stay as my family members? This sounds rather too simple and I'm sure there must be a lot more to it.

Can anybody explain to me, a mere simpleton, in words of one syllable, just what is the best way of achieving this move?

Thank you in anticipation!