Tumbling On Hard Floor Help?!

[tumblelinds]

I was raised on a spring floor and can throw round off handspring layout as my pass, and am next year going to try out for the middle school cheer team but am completely terrified of tumbling on the basketball court, i am scared my arms/ wrists will give out or i will slip. my friends are dancers and throw bhs like no problem on hard wood but i just cant bring my self too. i just keep doing round offs and wont throw it PLEASE HELP?!