custom gui tools

https://invidious.tiekoetter.com/watch?v=1EIpek60rs0 While I'm nowhere near as experienced in Linux as he is, he does make some points I found interesting, such as a lack of customization (something I've experienced in Mint XFCE). Because of that, I wish I was a Linux user in the early days of...

Hey a linux noob here! I was wondering if it was possible to create a custom GUI for linux so that it would look like a console style GUI. Are there specific tools for this? Do those tools require complete knowledge of linux? Can I also edit the splash screen image on boot up? It would be good...