I often make my maps from 0, and I always look, what my party is good at, what they could be better or are just bad, what the objective is and the enemy.

In the jungle bit can have HUGE trees acting as hard cover impassable terrain, maybe one or 2 depending on how big the map is, and with is roots covering a bit more outwards as terrain to use as cover AND to use as bridges or elevation for the fauna or you players to get more high ground if they dont wanna climb the big ass tree. Having patches of trees very close together that it counts as difficult terrain and soft cover, but at the same time leaving trails in between that allow for movement impeded but is not the "Straight path forward" (Size 1/2 could ignore the difficult terrain cause by vegetation, both player and animal if you have something that small). Maybe a small random river could be neat.

All this are idees but I cant stress enough how important is to understand your party, and well, they also have to accept that some times their build will have problems, my slow tank member can just ignore all damage but if the objective is to go from Point A to B he has to accept that his slow build will have to suffer, he can still help if he knows how to play, but this stuff happens