I know we had a run in, but I'm being serious this time.
I find weed is easy to stop with no ill effects whatsoever, it's not a "physical" addiction like nicotine. Tobacco, that's another story so the best advice I can give you is get the likes of e-cigs WITHOUT nicotine in the fluid, that way you have something to do with your hands, and some sort of nicotine replacement such as the patch or spray to help wean you off the nicotine. Break the nicotine habit, then breaking any other smoking habit will become easier.
You have your anxiety and ADHD which might make things harder, I have my PTSD and depression which doesn't help me. But the bottom line is that everyone is actually stronger than they think they are, and with the encouragement you'll get here alone you'll find that you're not doing this alone, you will have people helping you, encouraging you, and that goes a long way to making you realise that, no matter what, you CAN.
Success, and don't look back no matter how strong the cravings are.