💬 Free ways to learn HTML, CSS and JavaScript? I'm stuck on centering a box

I started learning web pages 2 weeks ago, from YouTube. I've watched parts of 7 different channels. That was a mistake, because each person teaches in a different order and uses different words for the same thing. One calls it a div, the next calls it a container, and a third one just says box. I kept pausing, going back, and losing track of where I was. Last night I spent 90 minutes trying to put 1 box in the middle of the page. Just 1 box. I found 4 different answers online and each one worked in the video but not on my screen. My brother walked past and asked why I looked so angry. I said, I'm making a website. He laughed for a while. I got it centered at 11:40 pm and I'm still not sure why it worked. I can't pay for a course right now. A paid one costs 3,000 or 4,000 rupees and I don't know if I'll stick. I want something free with a proper order, so I know what to learn first and what to skip. Videos are fine, but I'd also like something where I type the code myself and it tells me if it's right. My phone has plenty of storage, so I could even practise on it during my travel to work. I've got about 1 hour in the evening and a bit more on Sundays. No rush, no deadline. Should I finish all of HTML first, then CSS, or learn a bit of each together? And how long did it take you before you made a page you weren't embarrassed to show anyone? If you have a channel or a site that worked for you, I'll go back and start from lesson 1.

Thanks for this. I tried freeCodeCamp last night and finished the first 6 lessons on my phone during the bus ride. Typing code on a phone keyboard is painful, but it checks my answer, and that really helps. I'll move to the laptop for the longer parts. Flexbox is next, I watched 1 video and I'm already lost again. I'll post here in 2 weeks and tell you how far I got.

freeCodeCamp has a built in editor where you type the code and it checks you, which sounds like what you want. Do HTML and CSS together in small pieces, so you see results quickly and don't get bored.