I agree with pretty much all of the recommendations. But if mac and ABH are too expensive go with drugstore ones like Maybelline, chubby sticks/lip glosses are also really nice if you're a beginner because they aren't in your face and they look fresh and hydrated which is good in the summer.
If you're stuck on things like contouring or highlighting or any of the complicated eye shadow stuff there are a few youtubers that are really good at describing technique as well as giving their opinions of products that work well.
You can either go ham with the drugstore stuff or go to a place with lots of high end make-up like Selfridges or John lewis and get the make-up artists there to give you recommendations on their top products. That helps you get a small collection of really good high quality make-up that you can use for everyday use.
(also companies like Anastasia Beverly Hills(ABH) and colourpop aren't available in the UK.)