It's important to have coverage on many channels. I'd suggest one post here on bitcointalk, and actively keep up with comments and community questions/concerns.

Also make sure your website, whitepaper and any other materials are up to par. Video is huge, so having some regular communication via YouTube is great for search and community recruitment. All the other channels mentioned here (Twitter, LinkedIn, Steemit, Medium, Reddit, etc) need coverage, though you'll do yourself well to join the communities authentically first and understand their rules and culture. Just posting once is not going to get you anywhere, especially if you are a n00b. Spend time in them, and find out whose who. If you can create relationships with real influencers, their support in the various forums will provide invaluable feedback and could help you get the attention you need.

Earned media is another route - which will take creating relationships with media sites (anything from CNBC to Coindesk) and if you have an interesting story, they may cover you. This is great for your website and additional ways to get noticed.

Also, having influencers as part of your project is key. You may do well to find some, and give them some equity to help you promote your project and guide it to success.

Good luck!