I want to try out for cheerleading at the beginning of April but I really need some tumbling like back handspring and stuff. I am going to take tumbling classes but I do not know how many times I will need to go a week to get a back handspring by beginning of April. I am a beginner and can barely do a cart wheel. Please help.

Ive been in tumbling for about 5 months I can do my back handspring in the pit with a mat and my coach spotting me. But my cartwheels stink! Really badly, I try my best but my legs wont go straight! And my round offs arnt any better.

Where having a test and we have to do these basic things.
Forward role = can do
Backward role = can do
Cartwheels = no
Round off = no
Back hand spring = sure
Hand stand = yes

For the ones I answered no to may you please give me some advise please? Thanks!