How to get fabric development under git source control?

I know this site. And I am sure, that something is "coming soon" and that finally all can be under source control. For me the question is, how soon. And how I could or should work right now, until my trial period counts down, and how I could save my stuff and work at the end of the trial period.

For me this is currently the biggest issue when using fabric. Should I spent a lot of energy and later just lose it? Should I not try to develop any sustainable, but just play a bit? I don't understand, why the current state of fabric is so closed: you can something bring in (code, development) but you get nothing out, except of Power BI reports.

Or is it more save, not to spent energy on evaluating fabric now, but only when there will be ways to save my stuff.