Ham licenses come in three types, with different types providing you privileges on different frequencies as you earn them. They’re all multiple choice questions, so you can learn them by rote if you need to. The radio you’re looking at operates primarily on frequencies that require a general class license. Starter class is technician and I’d say an hour a night for a week will get you licensed at that level where there’s lots of portable and mobile units. You can either pick up one of the $100/$200 portable units if you want to get on the air as soon as you’re a tech, or just use the 7300 as a receiver for a while as you work on your general class license. With application, it’s a couple of weeks work.
Here’s basic licensing info: https://www.arrl.org/find-an-amateur-radio-license-exam-session