You can do it man. Your only limitation is expensive equipment (alignments and such) I promise you can learn everything.  

 Respect 🫡 

 the only useless thing is the quality of alot of the information. well, that and a liberal arts degree. but you CAN figure it out. 

 Just take it apart. Don't stop until you you get it back together.  

 This is actually pretty solid advice.

I did this with 3 poulin chainsaws one time. Made one good one from 3