Have a go!
It can be fun and frustrating at the same time...
I'm only a dabbler, but I've successfully with te help of another home camera repairer taken apart and sorted out a cranky Contaflex Super B as well as minor repairs to several other cameras.
He knows more than I do about camera innards and helps me.
My background with fitting and machining means I can help him with weird tools and so on.
Just start wih something you won't cry about if you kill it and have fun. If it's not for then you will figure it out pretty quick.
Those Tomosy books are good too.