People requesting personalized plates are not allowed to choose plates that could be construed as an amateur radio call sign. Your callsign plate awaits you only. My car plate says N6DRB, and I am proud of it. It lets people know I am a ham. There are millions more things to do.
Amateur radio is very diverse hobby.
I suspect no one ham has ever done it all. It can be inexpensive, or it can cost thousands depending on what you decide to get involved in. Locate a ham radio club in your area and get them to help you get a license.