Help with Calisthenics Competition Prep

hi coach,
I should do a calisthenics competition consisting of this circuit:

15 pull up
20 dip
10 chin up
15 bar dip

in the shortest possible time.

I have 3 months to get ready, and I can train 3 times a week. You can help me organize the training to get fit and ready for the race.

basic I can already do 18 pull ups and 18 dip, but I need to understand how to organize myself to be able to finish the circuit in the shortest possible time. thank you so much!