I suggest that you go to a library or obtain a copy of the Amateur
Radio Antenna Handbook. A good starting point.

I tried to build a few antennas for CB. Too big to deal with.

2 meters antennas are small, portable and get good gain.
Plus, the range on VHF-FM is incredible. 50 watts will
talk farther then 120 watts of sideband on CB.
(not including skip, tropo or other enhancements)

Look in your library in 621.384 A.