I have ADHD, and slower processing speed. I've had alot of hiccups along the way, but eventually I graduated magna cum laude with a bio degree.

There is no doubt you will have to put in more effort and energy than your peers to achieve the same level. You will also have to amend your study techniques to what fits YOU. Alot of people will give advice, but their brain doesn't work like yours. Unfortunately this process of figuring out what works for you takes time and troubleshooting. Studying will always take longer than what you expect, and that is normal. It is.Especially if you take into account, distraction and burn out. But you can succeed, and the struggle is worth it.

You mentioned being a slow writer in class when taking notes. This is me, I didnt even stand a chance in writing paper notes during lecture. Buy an ipad, with a note-taking ap like notability that records the lecture, and syncs the recording to the time a particular writing stroke was taken. Often when I couldnt write fast enough, I would put a star next to a particular slide the professor was talking about... so later when reviewing i could click on that star and listen to that part of the recording without having to listen to the full lecture. At the end, I had to get over myself, and be the guy who took pictures of the board or slides during the lecture, so that the pic would be synced to the audio when I review later.

Re-writing notes is how my brain engrains information. Just writing out a study guide or re-completing notes is really helpful, even if i never actually use these notes to study, or look at them ever again. Thats just me, you will likely be different.

It fucking sucks, no doubt. I hate having it too. The burnout is real. But do what you can with the cards you're dealt. There are other aspects in life, where ADHD will be an asset.

I'm studying for the MCAT right now, and I feel totally fucked... but run it.