There are many front ends you can use to post, and it costs you nothing. (Steemit.com, steempeak.com, esteem app, busy.org etc.. lots of choices just have to find what you like). 3speak charges a fee for using their video platform, but Steem is free to use .. just pick your front end.

It looks like you have an avatar now, but if you have any questions about changing settings (done in your wallet), how things work etc, feel free to reach out or check out the faq here - https://steempeak.com/about/faq