Engine building

[Mayhem.Evol]

I noticed a lot of you guys build your own engines (well of course kinda..) so i thought id ask u..

How am i supposed to learn how to do engine work? Theres no class at my school(well there is one, but it requires me to drop everything else except core classes and that just isnt an option this year), my parents dont do it, and i dont know anyone that does it lol.. it seems like im just kinda out of luck.. I really want to learn how to build my own stuff but it just seems really impossible at the time