It feels normal. Until you talk to more people and realize you aren’t normal and you don’t actually suck and you might be able to get it together and have a reasonable life if you chain yourself to daily meds and sleep enough and exercise enough and have routines and build 20 other environmental tweaks, guardrails, and micro habits.
There’s some breakdown between wanting things and being able to do them. Wanting to do the things but letting down everyone (teachers, friends, family, self). The thing you can’t do might be chores (frustrated that the house is a mess but unable to make it not a mess), keeping up with friends or family (never keeping in touch enough), hobbies (never able to focus long enough to really make progress), work (continuing to function after the initial learning curve wears off), being able to focus long enough to read books you want to read, having conversations with people who prefer to have one conversation at a time instead of four, listening patiently and not interrupting as someone continues explaining the thing you picked up on after their fifth word and they’re on their fifth sentence now…
Everything falls apart slowly and it’s easy to get frustrated with yourself and lose hope. Meds help but being chained to them is a shitty feeling too. They’re a pain to get and require frequent check-ins as stimulants are controlled substances in the USA. The other non-medicine interventions all help in little ways that add up too.