My immediate cookbook recommendation is either a Better Homes and Gardens or Betty Crocker (older edition, tif possible) followed immediately with a longer read with ...
The Joy of Cooking / Rambauer- Becker, UK edition. I think the Joy is complex as a first read, and having used multiple recipes from US editons over the years, it becomes more understandable and you find how could I have missed reading this, even though my fingers touched the pages or find things you didn't pick up on the first go-around.
Check these or any cook books at your local bookstore before buying. Do you have a Used bookstore you can look as well?
As has either been mentioned or alluded, you will find multiple opinions on these pages. I think this is one of the hallmarks about DC. You get to
decide what is best/ most workable for you until someone else offers a different idea, and then you go Whoa, and you add that into the equation.
Delia Smith seems popular in the UK. I may have copied some of her recipes, though I don't recall making any yet. She may have an active TV show , Youtubes and cookbooks. Worth checking out.
I may be a wee bit older than you, but I remember watching Two Fat Ladies on PBS in US/ BBC UK Now available full episodes on YouTube. Mention this for our Am friends as well as you. Cooking made fun. On motorcycles.
Start small, think big.