Hi Rene,
Thank you for reading my article and for your comment. I use WordPress basic with SEO plugins (All-in-one SEO and Yoast SEO). I tried both and can recommend them.
These plugins will help you check how well your content is optimized for organic search. These tools have a free and paid plan. I use a free plan.
I believe it's worth exploring free options before upgrading WordPress.
As to SEO learning, I definitely suggest dedicating your time to understanding and practicing SEO. These skills will pay off in the future. I know it from my own experience since I've been doing SEO for the past four years.
If your goal is to create content that ranks on top, perhaps, my 50-page guide will be helpful for you. I'll leave a link here - https://victoriakurichenko.gumroad.com/l/how-to-write-blog-posts-that-hit-google-front-page