@Easeljeasel You can't go wrong with Delia's How to Cook series. There's a lot on her website too. I like her because she explains the how and why of things, which helps you later on as you become more confident; once you understand, e.g. what an egg is doing in a cake recipe (binding it together), you can work out what substitutes work / don't work etc. She takes it from the basics and builds up.
If you have dinner party anxiety, I'd suggest getting a massive Cook quiche (or 2) and accompanying it with salads, olives, posh bread, cheese, ham etc. The quiches look extremely fancy - I'm a very competent cook and I'd happily serve (and eat) one in a heartbeat as an entertaining meal. The other thing that looks better than it is (really) is a roast gammon (which you can make the day before to save stress - Delia has a really easy recipe for this) and accompany it with coleslaw, bread, salads etc.
The other thing friends of mine have done sometimes is served cake / pudding 'made' by their kids, e.g. fairy cakes, biscuits with ice cream etc., so a) super cute, b) very forgiving of anything that isn't quite perfect
c) something nice to do together that gives them some cooking lessons too.
Once you get a bit more confidence, some (small) gadgets will really help save time and effort. I have this, which means I can make fancy looking coleslaw in minutes, grate carrots for different sauces, prep all sorts of fruit and veg in seconds.
Also: always buy frozen ready-chopped garlic and ginger. They are both a pain to prep (time, effort, mess) and keep really well frozen. I use my slow cooker a lot, and batch cook and freeze meals a lot (the chilli below freezes incredibly well - I always make huge quantities of it).
I also used to use (when learning to cook) a lot of children's cook books, as they break it down really well, child-friendly, easy recipes and good to follow. Tbh I still use them now. Deliciously Ella is another good one (her first book at least) - they're all vegan, but you can adapt them (e.g. using cows milk where she stipulates almond etc.) but she has some really easy, tasty recipes and very easy to follow as she couldn't cook at all in the beginning (her measurements, for example, are in mugs). We eat this at least once a week with chips, wedges, a jacket, in wraps or as nachos and it takes 15 minutes to make, very healthy, very tasty.
Final tip - meal plan. My DH can't (genuinely - he's severely dyslexic so really struggles with instructions) cook, so on the days I'm back from work late, I schedule the easiest meals for those days, e.g. pasta and a sauce I've made beforehand, or jacket potatoes, baked beans and cheese. Do the same yourself - there's nothing worse than realising you've got a ten stage recipe you've not made before when you're hungry and it's getting late. We once spent 3 hours making a meal kit that was marketed as 'quick and easy'
never again! (Spice Tailor - don't go there!)