Help Me Build A PC/Computer

Right so basically, I want to build a computer. It will help me for my GCSEs to have one but also it will be a good skill to have and having a PC is also useful for other stuff (like gaming, video editing, etc.). I go to a private school but I got there on scholarship, so basically everyone there is richer than me. Everyone there seems to have a good PC and building one is the most cost effective (and fun) way to get one. Again, building a computer is a good skill to have and I want to learn it. I'm doing computer science GCSE and I want to learn to code games, so having a good PC will really help but it will also be good for home life. Obviously many of you won't see the point in giving some random teenager the money to build a PC, but to those who do, I thank you greatly. Also here's the link to my part list (https://uk.pcpartpicker.com/list/rCfX9W) if anyone can recommend any improvements that would be great.