I'm currently converting. I'd like to move to Israel at some point to improve my Hebrew, and because I suspect there'd be good teachers there.
Khan Academy is pretty fun - their "hierarchy of concepts"-idea, of tying exercises together is smart.
You should be able to work through literally all their material in half a year, and it'll last you if you're the kind of student who takes notes and looks up external sources for gaps in background information.
It's a bit light (for me, having been in the secular system all my life) on background, but the focus on exercises provide a good skeletal structure, and a basic reward system and overview of all the materials. And it's nice that the lectures use a very easy-to-read blackboard, have clear sound, and are consistent in quality.
I can also recommend reading "Godel, Escher, Bach", and working through the exercises - I didn't make it until the end, wasn't ready for it by the age of 20, I suppose. I kind of hope to get around to it some time after I've completed my conversion.
G.E.B. is a very lively introduction to formal logic (and grammars!) and computational theory. Explains things such as "why a closed system of logic cannot prove itself", and teaches you to build your own systems of formal logic.
The Trivium is also something you might enjoy, I have it hardcover myself:
https://www.amazon.com/Trivium-Classical-Liberal-Grammar-Rhetoric/dp/1632864967
I've just thumbed through it, you could have a lot of fun with it and it'd provide you with a good birds-eye view of classical fields of knowledge.
I could also provide recommendations for computer programming/coding/hacking, but that's more specific than what I can glean from your post.