Need personal help with HTMl/Embedding

Hello! I wanted to edit my profile and I did try a few different tutorials I found online, but I'm still struggling with it. If anyone is able to help me out with it I would be very grateful. I need help on almost everything and I want to add a bunch of stuff and learn cool customization options that you can do. I already know some of the images/Gifs I want to use. Some of the embeds I use don't show up on my page. If you would like to help you can add/message me and if other forms of communication will make it easier to teach, then, I will be more than happy to do so.