How to practice over summer to make team next spring?

so i didnt make the team this year :( there were 2 cuts they made at the tryouts. the first cut was the big one where they cut like 50 people. then the second one is where they cuted liek 15. i was one of the 15 that got cut, but ive never rly played volleyball before and the volleyball coaches said we had potential to make the first cut. so i feel proud for that. but i really wanna make the team next year. im really good at ping and bumping and setting, but need to work on hitting, spiking, and over hand serves. what are some ways i can practice those things over the summer. i cant go to a volleyball club because there like $2000 where i live, where do u recommend i go? how should i practice? i REALLY wanna make the team, and last tryouts i put LITERALLY my blood, sweat and tears into it!!! like SERIOUSLy blood sweat and tears. i would do mostly ANYTHING to make the team. and btw, at the tryouts they put tally marks next to ur name if u made a mistake, and the people with the most tally marks got cut. so any tips on how to make it? thanks so much !(: