As a new licensee, and new to RR, welcome.
A couple of things I'll point out….
1. Consumer off the shelf "GMRS" radios are usually junk. Midland makes a few 'mobile' GMRS radios that have become popular with the off roading crowd. While they will support repeater use, they are forced to narrow band, which usually doesn't work well with GMRS repeaters.
2. It would be a good idea to read the FCC rules pertaining to GMRS, especially since your license requires you to follow them:
Electronic Code of Federal Regulations (eCFR)
3. If you want good and reliable radios, you'll need to look at commercial gear.
4. The FCC rules require using a radio that has FCC Part 95 certification. That limits you to a handful of radios.
4.5. Some will use radios that only have Part 90 certification if they meet the technical requirements for Part 95. That's a decision you need to make, however, the FCC rules are pretty clear on that.
A really good portable UHF radio that will work on GMRS and has the necessary FCC Part 95 approval is the Kenwood TK-3180. However, you need to make sure you get the 450-520MHz version. The 400-470 version does not have Part 95 approval.
Kenwood stopped production of the TK-3180 just a year or two ago, so it's still a modern radio and there's a lot of support and accessories out there for it. It has a nice 14 character display that lets you put in channel names. It'll do 512 channels, so it's easy to program in not only the simplex channels, but also your local repeaters.
They are more expensive than the consumer grade stuff, but they will outlast them by a long, long time, and they have a lot more features.
The KPG-89 programming software for those radios is pretty easy to learn, as radio programming software goes. Probably one of the better programming softwares to learn.
That software will also program the TK-8180 mobiles. This is the mobile version of the TK-3180 portable. Similar functions, capacities etc. You can transfer the programming file for the TK-3180 over the 8180 mobile fairly easily with some minor setting changes.
Like the TK-3180, the TK-8180 comes in a couple of versions. The only one that has FCC Part 95 approval is the 450-520MHz version in the non-H model. Good solid radio and will last you a long time. Easy to mount those in your car or pair them with a good base antenna and a power supply and you have a nice base station.