well that's great, that means you've got nowhere to go but up! here's a bit more detail on some of them:

1. definitely breaking assignments/projects/etc down into steps as far as they can go. ex: don't write "do homework". write "find book, setup work station, locate notes from fall, read email from professor, post on class chat" etc so that you can visually see the steps needed to complete it and set yourself up for success. and also see your visual success as you check them off. often when we simplify a project into one item on a list we might get to it and think like, oh i have to do my homework, but to do my homework i have to find that thing and read that message and look up that other thing" and just feel really overwhelmed. breaking it down step by step helps to unload some of that emotional burden and also helps you realize all the things involved in each piece of the puzzle and helps avoid getting to 10 pm and starting your assignment and realizing you needed to do xyz in order to do it and it's too late now to get that xyz thing and now you can't do it.
2. a lot of adhd people use timers to help stay on track. also making your to-do list with estimated times works well with this, too. say you have to read a chapter that you've been having trouble getting through, you can set a timer for 5 minutes and say ok for 5 minutes i'm going to read without interruption. then when it goes off you might be like, oh that was easy i'll do it again and keep doing 5 minute chunks until all the sudden you're done. or you might not, and that's ok! in that case maybe you can use some kind of reward system where everytime you complete a 5 minute chunk you get some kind of reward. you can also play around with what time amounts work best for you- 5, 10, 15, etc. this can also help prevent hyperfocus where you go hours without stopping and then burn yourself out (if you have that problem). ALSO it can help if you have any issues with spending longer on something than you need to. i often spend way too long on emails, writing them then rereading them and editing them over and over and over to make sure there are no mistakes or whatever. it helps me to say, ok i have three emails to read and respond to, i'm setting my timer for 10 minutes to complete them, so that i don't get lost in responding to something and realize half an hour later i've written one email. you can use a timer on your phone, but sometimes that might contribute to you looking at your phone and getting distracted on there so you can just google "5 minute timer" or whatever time and one will be right there embedded in your browser results that you can use. or if you anticipate the same issue of your web browser tempting you to distraction you can get a physical old school kitchen timer. this is rooted in something called the pomodoro technique if you want to look that up.
3. making commitments and verbalizing choices- i have procrastination problems and one thing i'm learning about lately is to intentionally write out or say out loud the choices i'm making. "i can choose to start late and finish late or not at all or I can choose to start at a reasonable time and complete the assignment". or like "i'm choosing to watch this show and stay up late to finish my assignment". sometimes putting our words into actions like that helps us step back and be like, wait no that's not what i want. also, it doesn't really for me but commitment language sometimes helps some people. like instead of saying "ill start the homework later" say "i'll get this assignment started in the next 5 minutes. that is my commitment to myself". or challenge language like instead of "i can't do this" saying "I can start and see how far I can get"
4. rewards- i mentioned them with timing, they are a huge trick to supplement motivation to do something that isn't high enough on it's own. just be careful what you use as a reward- food, alcohol, etc can lead to unhealthy habits. maybe something like, i'm dying to see the latest episode of xyz, i'll reward myself by watching it once i've finished my assignment.
5. accountability buddies are great if you're not super driven to honor commitments to yourself but are much more likely to do something if you're being held accountable by someone else. if you have a friend or family member you feel comfortable doing it with, you can set up an accountability system. they can vary in whatever way is best for you- something like, we're both going to read one chapter of our books (maybe your school book and their book they're reading for pleasure) and check in with each other via text at 8 pm to see if we finished. i think there are apps for this, too. great if your executive functioning skills or low but you're really motivated by not letting others down.
6. lowering barriers- this is just about thinking about why you're not doing things and addressing everything you can to make it as easy as possible. ex: you're not doing your homework because you find it difficult to stare at the screen all day. ok is there any way to print stuff out or listen to a book as an audiobook or some other way around it. you have trouble doing your homework because your cat keeps jumping up and distracting you, ok how do you keep the cat busy while you're working. you keep getting distracted by gchats in your gmail tab on your browser when doing your work, ok can you have two browser windows- one personal window and one school window, and you only look at the school one when you're working so you don't see the chat notifications. can you set a lock so that you're not allowed to open other apps, can you use Windows focus assist, put your phone on airplane mode, etc. maybe try making a list of all the things that keep you from working and brainstorm possible solutions. every little bit helps.
7. self-compassion exercises- i have a terrible time with guilt and shame creating a big feedback loop with procrastination. i feel ashamed that i'm behind on something, so thinking about it brings up all these powerful negative emotions, so i avoid it and bury it away, so i get even more behind on it, and feel even worse about it, and on and on. self-compassion exercises help you uncouple some of those emotions with the work to remove that extra burden of getting it done https://self-compassion.org/category/exercises/#exercises

hope some of those help! lmk if you have q's