They have free SEO training videos on this website: https://website-installer.com/training.php I think these free training videos are a great learning tool for newbies who are trying to get their foot in the door and want to learn about traffic, creating backlinks and how to rank without backlinks. These videos also show how to optimize a website to help aid page speed and generate thousands of pages. If you’re a beginner when it comes to SEO, these videos might help you. If anyone else knows any useful SEO training courses, comment down below. I’d be interested in taking a look at them!
There are tons of free SEO training videos available on youtube. So it seems useless to me, but the fact that you've dropped the link in the post does make me wonder if you're attempting to advertise this particular website or obtain a backlink.
Youtube is open for everyone and experts like Brian Dean and Neil patel and Moz Rand Fishkin is covering these stuff with high end knowledge so follow them.
Youtube and blogs would be the best sources. There are some free courses on Udemy, you can check those. Also if you want a certificate after the training try YOAST learning.
I wouldn't take lessons (free or paid) from self-proclaimed SEO experts when their own website is No. 4,891,132. My website is even doing better than theirs Why don't they use the SEO skills on themselves first? Plus, i also realized, unless you get trained by google themselves, all these other people only know like 1% of the google algorithms. Actually they are using what google is giving for free and extrapolating in neatly laid tables. Just use your head. Be guided by experts, to know which buttons to turn. But create your own strategy and stick to it if it works. Rinse & Repeat!
There are great informative videos and webinars on youtube that you can watch for free and learn a lot. You should check them out.