Check out Squirlly, it's by Neil Patel - not that should matter as its a product, but it's at least by a big SEO name & they give lots of free guides, etc. which can be helpful.
If it's still free - havent checked in a long time. Only been using a grandfathered (really old lifetime subscription) account to use their keyword research tool. Which, by the way is marginal, but very fast so good for high level long tail research - but doesn't justify purchase (new, FYI).
I have been using Yoast for some time, now that I understand what I'm doing - but for a beginner - it's very user friendly (and teaches you to write, more like structure, your content). It would be a backward step - IMO - if you are already up on SEO a bit.