Academics with ADHD

So I have combined ADHD and I was only recently diagnosed with it. I’ve been struggling in classes for a while not because I don’t understand the material but because I can’t focus enough to be able to complete my assignments by the deadline whether that’s because I get distracted talking to my bf, friends, or simply sitting in front of my computer but having my mind be in a completely different place. I don’t know what to do. If anyone has some advice I will SO gladly take it. I’ve tried pomodoro and time blocking (I just end up zoning out the whole time). So I’m very open to suggestions. Thanks y’all! - a very grateful adhder