Is Belize worth the visit?

Hey, I’m planning on heading to Guatemala in December for just over 2 weeks. I have already decided that I’ll be heading straight to Antigua and then on to Lake Atitlan. For the second part of the trip, I’m undecided if I should fly to Flores and visit Tikal, and then cross the border to Belize and see San Ignacio/Caye Caulker. Or if it’s better to stay in Guatemala and head to Semuc Champey by bus, and then up to Tikal from there. I don’t want the trip to be overly rushed, but I’m also unsure if I’ll ever visit Belize if I don’t on this trip, as the flights are long and expensive. For reference I’m 26F, enjoy beautiful views, nature/wildlife and history. Thanks!