Hello, Sturla, and and Welcome to Steemit.

Yep, Steemit is the home to quality content. Of course, it has a fair share of shitposts, but there's so much good content here that the shitposts can easily be ignored.

It's great that you are going to be working to help others improve their writing. That'll be a great initiative, and if done properly and consistently, could even have a major impact on Steemit.

Also, I like your idea of doing a SERIES. I also do several series, for various reasons. First, it makes it easier to compile many posts. Second, it's a very effective way to attract and keep followers (and therefore a great way to build the Steemit community.)

Below are a few basic points of advice re posting on Steemit.
1 – Longer posts are more lucrative than short posts. If you make a post of 20–30 paragraphs, it's more likely to earn rewards.
2 – Include some photos, images or graphs, to complement the text.
3 – Make sure the text and photos are formatted properly, so that your post looks attractive and appealing.
4 – Be yourself.
5 – Be interesting and informative.
6 – Create quality content. Steemit is intended to be a platform of quality content. (You will see many insignificant posts with meager content and no quality. Most of those of posts [called “shitposts” by Steemit whale Stellabelle] will earn few rewards and soon pass into oblivion.)
7 – Get online and start curating. Read various posts, comment on those posts you find interesting, and upvote those posts. That’s the best way to attract followers.

Hope this helps for now. Good luck, and Full Steem Ahead!