GMRS 101 Putting aside the dry wit and sarcasm, it's a good
Intro to GMRS YouTube video.
If that video and so many others convinces you, then work your way through the FCC license process which is made simple at:
How To Get A GMRS License – Easy Guide To GMRS Licensing Actually, not like a HAM license which requires a test. GMRS needs no test, and is more like a fishing license -- pay $35, wait a few days and you get an email with approval and a callsign. Really simple.