It took me until my 50s to stop being self-conscious about my slender body and skinny arms. Exercising more helped a bit but it was mostly in my head. My advice - love yourself now! (The sign was for a Twitter pro-nudity campaign)
[M] 18 120lbs 5’8” | It’s been warming up outside so my friends have been wanting to go skinny dipping often which is making me a bit more comfortable being naked around people , still a little insecure tho 😅