some things are pretty universal to working on motorcycles (and even cars) where only the measurements and numbers change, while others are night and day different.
To answer your question the cb350F is nothing like the 750. Yes they are both single overhead cam motorcycles and that is about where the similarities end from a maintenance standpoint.
Honestly, the only things you need to "Learn" a cb350F is a manual, a set of tools, common sense, a cb350F, a driving curosity, and understanding that what ever mistakes you do can be undone with enough time, patience, and money.
so don't wast your time studying the 750 "literature", download the 350F manual from this site, get the honda general manual also, and go from there.