SEO is about research, implementation, reports, changes, and repeating. If you do so, see the magic happening.
Here are the resources that will let you fulfill the need of constant learning and improvements.
YouTube Channels I Recommend
Passive Income Geek
Keyword Research in SEO
Does Keyword Density Matter?
How to create great content?
[videon] What is On-Page SEO - 2.1. SEO Course by Ahrefs
[videon] Pt 2: How to Optimize a Page for a Keyword - 2.2
[videon] Image SEO | How To Rank in Google Images | Alt With Example
[videon] Internal Backlinks Banana Seekhe | Types of Internal Backlinks
[videon] SILO Structure Kya Hota Hai? | Flat vs SILO Structure in Websites
SEO Blogs I Recommend
Search Engine Journal
Check the SEO tools I recommend here.