Which other teams are in your nearby area? Their experience can be invaluable.
ChiefDelphi
One thing to keep in mind when seeking design resources is to take into account your material and manufacturing resources. Can you use/have access to a mill/lathe/laser cutter/jig saw/hand saw and can you make it out of titanium/aluminum/steel/wood.
Essentially if you go to the website of any Recently inducted Hall of Fame team you can find resources on how to build robots, as well as teams.
Reach out to other teams in your area that have been around longer than you and get help from them.
There are a variety of mechanisms that CAN be useful in FRC, but they don’t have to be complicated or extreme, nor do you have you use a specific type of mechanism in any given game.
Start simple and use these resources to get your team to a competitive level. Extremely simple robots can perform just as well if not better than many robots that are more complicated.