hi there :)
Welcome to Fosstodon and Mastodon. Things are a little slow at first but as you find people with similar interests and follow them, others will follow you. Create your bio, add an avatar pic and some emojis to your name so others can learn more about you.
You can find the custom emoji list here:
Also see @kev's most awesome blogpost about getting started here:
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.