I feel nothing

Hey, I’m 24 and I’ve been doing Kegel exercices for something like a month now and I’ve tried a few prostate stimulator for years now (once every fews months) none of them are Aneros because my sexshop does not sell that brand, I hope I can still post here. The few prostate stimulator I have tried have had absolutely zero effect on me, I’ve relaxed my “kegel” muscle (I don’t know the right name) and breathed and focused on the sensations but there were none, or almost none. When I contract the “kegel” muscle and relax it alternatively it feels sort of nice but it doesn’t get better with time, it feels the same after half an hour than it feels after ten minutes and also the muscles are getting tired at that point. I’ve just recently bought poppers and I’ll try it with poppers but I’m getting increasingly disappointed and irritated that it has so little effect. Also there is one toy with the shape of a crab’s claw that I simply cannot put in my ass. It doesn’t get in, I don’t know if it’s because I’m chubby or something or because my ass doesn’t have the right flexibility or shape but it doesn’t fit, a portion of it stays out. But the other toys, the ones that fit I sometimes forget they’re in, that’s how little I feel them, does anyone have advices for a beginner who can’t manage to get anything done? Does anyone knows the next time on the path or something like that? Thank you for reading