I have given a few talks on Medium (2 of them on Medium Day last summer and 1 to a writers group from Crows Feet). My advice is play the long game. Engage every day by reading other people. I typically read 15 - 20 pieces a day and leave comments. I never EVER ask anyone to read my pieces or embed a link to one unless asked. To many it comes off as insincere, like the only reason you read their piece was to get them to read yours. I never do follow for follow or read for read. I see you publish to Illumination and Synergy and B&B Blogs. You might hunt around for a few more. You have over 900 followers. That will grow in time. I have a whole bunch more advice, but I don't want to hog this space. Last bit of advice - there are no shortcuts or secrets to being successful on Medium.