@JenJen I think it is fantastic that you have cancelled Wix and that you did an excellent job on your handcrafted website...I like it much better than the Wix version!
I had very similar feels when I first made a webpage using plain HTML and CSS in Notepad... simultaneously "OMG this is hard and frustrating" and "OMG this is neat I can do ANYTHING I want!" as I saved my files and hit refresh on the browser to see what I had created or inadvertently destroyed. Even though I know how to code making a website this way is somehow a different experience than "normal" programming.
Also I want to say don't apologise for or blame your ADHD and dyscalculia for the struggles you had with the "streamlined" Wix back end. It speaks more to Wix's disregard for accessibility and different use cases than it does anything else. Wix is genuinely frustrating for most everyone.