fitness people i need some help

heres the spill,

I play tennis and I just finished my season until August, I plan on hitting three days a week maybe more maybe less depending on time, but I do want to workout also. this is where my problem is.
I try to run everyday for a few miles which helps and I also try to do body weight exercises since i dont want to go hard on weights and hurt myself. my question is should I continue to do just strict bodyweight and cardio or start with the weights for the offseason until August. and if weights what is a good plan to follow?

thanks for any help