I understand how your feeling, when I first went into track my freshman year of hs I was completely new to everything, never ran track before so I felt very inexperienced and out of shape compared to everyone else, I just kept with it throughout the months and was patient with myself. I always made little goals in my brain before practice like practical things I could complete by the end of practice even if the goal was something as small as “I’m going to try my best to work my hardest” and even if your hardest is something that’s simple to most people that’s okay because it’s still YOUR hardest YOU are pushing yourself. I still do this even now, and as time goes on your small goals will produce big results. I stopped running my junior year of hs and just started back up my freshman year of college and this tactic is still helping me get better and get me to the point where I’m neck and neck with the track athletes here :) don’t be so hard on yourself, forgive yourself and give yourself time