Does body heal on it's own if there is any damage due to masturbation

hell guys I am 21

So it's not like I masturbate that much but there comes a phase where for a week i just feel horny so i just watch porn and masturbate still not that much though like 2-3 times in total that week.

one more thing that I ejaculate too fast like in 30 seconds and sometime 1 minute

but maybe it's because of low testosterone(I heard this from doctor)

why I feel like it's because low testosterone? because I had no physical activity from covid like not much i did nothing no workout nothing just video games and all inside home

but now i am trying to change it so i have started doing workout and last time i masturbated was last week(because I got horny) that too after long break like 1 month which I broke it

so my question is will any damage done by masturbation like sperm quality and early ejaculation etc. will my body heal on it's own if I start doing regular physical activity(workout and sports), good diet?????

Thank you