I have many farm maps, I'll list a few.
Expert Quarry, Can be a bit of a tricky map, there's quite a few neos and there is also a +1 ladder tower.
Hard HauntedForest, Is a pretty simple map, not many quads, isn't too long, only one neo and is good if you're just starting out.
Hard MandMs, Has a double neo at the start and a few neups, if you can do cross neos better than a neup or a double neo do quarry instead.
Hard Clouds, a bit of a longer map but the jumps are super smooth if you want to momemtum them, there's also quite a few headhitters but I have a plot setup just to practice headhitters.
Expert City, Quite an easy map if you're good at cross neos, it's short and there are no double neos or neups.
Insane Panda, Can be a little hard if you aren't good at catching ladders around corners, other than that it's pretty easy.
Expert Greatfox, Another map with lots of different kinds of neos, If you love doing neos Greatfox can be fun.
If you want to practice a few jumps do /plot v TheExodus_ and read the signs.