Im having trouble making friends on the cheer team? and other problems?

so i recently joined my school's cheer team but im having trouble making friends. its not that im super shy or anything ( i have plenty of friends outside of cheer) and its not that i dont like the girls on the team either ( i think that theyre all super funny) the thing is that the girls are all extremely cliquey and i have trouble joining in to conversations because i feel like they are talking about things that i have ZERO knowledge of (like inside jokes, or shhh the ultimate plan). that has made me pretty shy with them and that leads to the problem of making friends. i just want a way to be able to get in on the conversations and make friends. because i am one of those girls that open up more after i get to know people better. so does anyone have any idea as to what ways to make myself more talk-to-able or to make myself interesting to the other girls? encouraging words help too :] and sometimes i have trouble picking up the dances so does anyone know of a way to fix that? also i cant even do a cartwheel and i really want to learn how to tumble so are there any exercises that can warm me up (and work on my leg/other flexibility) or help to even make a cartwheel possible??? thanks bunches!!!