Welcome Welshfuture. I don't want to scare you but the beginning is the hardest part. After I stopped drinking after 20 years I suffered from insomnia, fatigue, brain fog – you name it.
You've already got a lot of good advice, just remember that staying sober needs to be your top priority now. Whatever happens, however you may feel, just don't drink. Drinking will only put you back to square one.
There will be cravings, so be prepared. Plan ahead. You can do it.