Oh, I just saw this.
I went to Belize back in , uh, 2014 or so? Lovely place. It's very cheap and easy to get around, as they take the US Dollar for all transactions.
I liked it because it wasn't a yuppie fake beach destination, like the majority of the Caribbean or places like Cancun or whatever. It's easy and cheap to get around in a car, which I recommend to do as soon as you land in Belize City. Main issue, that you must head and must remember, all the time: the speed bumps in Belize are demonic. They are all over the main, 2-lane expressways the cross the country, especially near the roundabouts. They aren't really speed"bumps." They are actually miniature walls that will remove an axel from your car if you try to drive over one at more than 20 mph. You HAVE to be warry. It is no coincidence that nearly every roundabout you come across will have a wheel and tireshop a few feet away and yes, at one of these junctures, we got out of the car near a speedwall (on one of the main highways), and discovered that the warning sign had been sawed off at the base. Almost certainly by the owner of the nearby wheel shop. So yeah...be careful, lol.
If you are into the yuppie douche stuff, however, then Ambergris Cuay is very popular; though maybe more of a "mid-level resorty place" compared to that part of the world. It has the second largest reef structure in the world, is an annual migratory destination for whale sharks, and there is a
giant hole out in the ocean.
I visited Belize City, Belmopan, St Ignacio, and Corozol, so I never really ventured into the south. I really dig old Mayan ruins and everything related, and there are few better places to check out all of that--especially a lot of newly-discovered, actively studied and re-emerging ancient city-states, than Belize. St Ignacio is probably the better starting off point, if that sort of thing interests you. There are quite a few ancient cities nearby, and you can easily visit a handful within a day, with very decent museums, with guided tours. There are some old burial caves, that require wading through caves and rivers to investigate (also guided), that is one of the most popular things to do there. From St Ignacio, you can also hire some guides to take you into Guatemala and back, for a day trip to Tikal. Highly, highly recommended. (You can visit Yavin IV!--but yeah, not sure what the border issues are like right now, with the pandemic and other issues. You'd have to do some research on that).
My favorite Mayan city was Lamanai, which is one of those that is emerging. I think we set up this tour through Corozol--a hotel manager gave us a contact to a family that organizes a ~1.5 hour river trip in a boat, each way, to the ruins (only accessible by boat), where they will introduce you to some nearby monkeys, point out the insane compound that was constructed by the sociopathic nutcase
John McAfee, (His compound, where all that went down, abuts this river--I was there not too long after that happened, so maybe that's why it was on everyone's mind), and then you get to explore the massive city that was Lamanai, and they fed us a home-cooked dinner when we returned, and ate at their boat landing. I can't recommend that enough.
The food isn't super spectacular, but it's pretty good and reasonable everywhere you go. In my experience, it's a pretty safe place to explore, but Belize City can get very dicey in certain parts, at certain times...but there also isn't much to do there, anyway, (form my perspective).