First off, Welcome to VEX Forum
The sources cited are always great. I would say that you tube (Specifically FUN Network in the pits and parts series) is an amazing source for anything. I personally think that team whisper this year had an amazing intake so check them out. Otherwise just make sure you look at google, YT and existing topics/ builds. If you have some idea that has like never been done or is extremely uncommon that is the perfect time for VEX Forum. Overall I would say try to do the research yourself although there are many of users here happy to help (myself included). I will put this here though PSA to new forum users v2