Is 13 with no tumbling experiencer too late to learn any skills? (cheerleading?

Im 13 and I cannot even do a cartwheel or bridge.. is it too late for me to try and learn a lot of tumbling .. i'm going to be doing cheerleading and tumbling classes once a week.. I'm scared everyone will think I suck at cheer.. also my jumps aren't good.. is it too late to be a cheerleader?