Matty, I'm not familiar with the Motorola model that you mentioned, but be aware that if your interest is actually in GMRS communications, the Kenwood radio that you listed is a Part 90 LMR (Land Mobile Radio) product that comes preprogrammed for 16 itinerant business frequencies, although it can be reprogrammed by the dealer, preferably at the time of purchase, for different frequencies. The TK-3402-U16P is not FPP (front panel programmable) and your GMRS license doesn't allow you to use LMR frequencies.
Especially since you're just starting out with this, might you not be better off using a genuine Part 95 GMRS radio such as a Motorola MS355R or a TERA TR-505?
Other Motorola GMRS models include the MS350R and the MR355R.
Another choice in a GMRS radio, similar to the Motorola offerings in price and features, would be the Midand GXT1050VP4 although unlike the three Motorola models and the one TERA model mentioned above, the GXT1050VP4 is not repeater-capable.
Or, as has been suggested by gdavis316, choose one of the low cost Baofeng/Pofung models such as the UV-82C which is a Part 90 radio that you can program yourself using freely available computer software. Additionally, if you happen to have a Technician Class amateur radio license, the UV-82C is legally usable on the 2 meter (VHF) and 70 cm (UHF) ham bands although strictly speaking, since it's not Part 95 certificated, it's not really legit for GMRS usage although many people ignore that fact and employ it in the GMRS anyway.