I've been vaping weed more and more, and earlier and earlier in the day. It's completely counteracting the benefits of my Adderral

In terms of impacting your life, weed is an addictive drug like meth or coke. It doesn't have the physical addictive impact of those drugs (i.e. you don't go into physical withdrawals) but it can have large impacts on your psychology and day to day to life. For a lot of people it is a massive demotivator and will prevent you from achieving the things you want out of life.

Treat it like an addictive drug. You have a problem, take strong actions to treat it. The good news is that it is much easier to get off than other drugs that have a physical addiction. If you get through 2 or 3 days without smoking the strong urge to smoke should fade. Get rid of your weed, don't have any in the house when you're trying to stop. Tell your friends that smoke that you're trying to stop and not to give you any or smoke around you. Once you've gone a a few days without smoking you'll be shocked how much less the urge is there. Go without for 2 weeks before you even think about smoking again, just to prove to yourself that you can do it.

But it's very easy to start again, so make some rules around when you allow yourself to smoke. Only use it as a reward for getting stuff done that day. Never smoke 2 days in a row. Every time you go to smoke, tell yourself out loud "I will not achieve any of my goals today".