Skateboarding ollie help? And what plan should I do if i hate really warm weather and i can't practice?

I can ollie on carpet good 90% of the time and i went out today and i tried to practice rolling ollies again but it's still hard for me to try to jump high so my ollies still suck at rolling now. It feels weird on concrete to try and jump which im having problems with on concrete. do you have any advice? plz help. And i live in the south of usa which gets very hot and i cant be able to skate that long cuz in like 5 minutes i would sweat like all over my self. do you have any good tips that can help me avoid so warm weather? Thank you very much! PLZ HELP! PS: If you laugh at my question about how i hate really warm weather, you will get reported.