Can relate a lot to this. You’re on the right track with booze and exercise etc. I’ve always found first 2/3 weeks are hard as f**k but if you push through it the head starts to clear, the weight (for me needed) starts coming down and momentum builds and builds. What gets me through first few weeks is just taking one day at a time, knowing at the end of each day I’ve done the right things and nothing stupid like a beer by myself or something, and that it’s just another step towards the right result. Takes time but it will feel great.