I think you're pretty spot on @jessamynorchard. The answers somewhat depend how they plan to approach it between posting versus curating.

But for a newbie...you'll be getting yourself built up more from your posts and/or comments. While resteems are nice, they don't get people to initially see your blog. This is usually more helpful once the following has been built. So I typically recommend resteeming a little less (like 1 a day max).

Definitely make the #introduceyourself post like she said. That's the place people here look for new users and help get those first people to find and follow you.

Welcome to Steemit @mikimike! :D