Would i have a chance in cheer?

I'm 14 years old and I would like to be a cheerleader because I have a lot of school spirit. Also, i would like to do some sort of athletics but every team in my school is super competitive so I don't think i have a chance. Also, I'm not even sure if i have a chance in cheer. I'm 5' 2" and about 95 pounds. short and thin. i have good flexibility as well. However, i don't have a slightest clue how to do any sort of tumbling or jumps and i can't even do a cartwheel. If i start now, would i be able to learn all that is necessary by next year to try out for JV? And are there any places that i could go to that'll actually teach a high schooler how to do these BASIC skills without being with 5 year olds?