First thing to do is get familiar with 'markdown'. There are plenty of tutorials online, these will help you to create quality posts. Also, find somewhere you can get free images for commercial use to backup your own images. Examples include pexels.com and pixabay.com.

Other than that... start posting, oh and find a community / people to chat to. We have a steemit chat available for post promotion and general banter but the majority of people seem to use various discord channels.

Any questions just let me know.

Cheers