For anybody who is keen to learn to cook but on a very tight budget and without much equipment, I'd recommend Jack Monroe, who writes from direct personal experience of living like that.
Also good old Delia Smith, whose cookery books are my staples. She's always very clear and precise. Her recipes always work for me.
Another thing that makes people more relaxed about cooking as they get older and a bit more knowledgeable is learning how to adapt recipes to what you have in store, or just how to throw a meal together with no recipe, just a wealth of experience.
If I look at a recipe that uses a long list of spices, I know it will be lovely if I make the effort to get them all and go through the long process of grinding, grating etc etc as specified, but I also have the confidence and experience to think 'I haven't got the time or enthusiasm to do any of that, but I do like the sound of that basic mix of ingredients. It will still be good if I spice it with I have to hand and that will use up some of that turmeric I bought for that other recipe that I don't want to make again ...'
When I was in my early 20s I'd have gone out and bought all the spices and stuck religiously to the recipe. I learned a lot from doing that, but it's all got pared down as I've got older.