Welcome back to the world of chess I hope you will find that the various forms of chess and wide variety of people playing will bring you some enjoyment even if tempered by a little pain.
You will need discipline to (re)develop the skills necessary to succeed again at chess and to prevent the one bad move nullifying the previous forty good ones [ thanks Steinitz ] .
I think a good start would be to go over a handful of openings well annotated by masters . Play white and black and get a least familiar with some pitfalls of each - it may also prevent picking up bad habits from playing weaker players.
Then try out your new found or rediscovered knowledge in a game or tournament (themed - so a known opening) and see how quickly in a few moves the wood becomes a forest. Good luck and enjoy the ride.
Anyway back at present and hopefully with new mindset, so now been about 32 years since my peak.
I have a puzzle rating twice as high as my game rating, based on this where would you say I need to practice/learn/read etc?
Thank you