Few things:
1. Please use image descriptions
2. Looking for an app? Get Tusky for Android, best I found so far
3. Still on Twitter? Use moa.party or similar for crossposting
4. Put your Mastodon handle in your Twitter bio, so people can find you with Fedifinder
https://fedifinder.glitch.me/5. Boost posts so people can reach people outside of their bubble
6. Consider a donation to people running your Mastodon server
7. Give people a chance and follow strangers, you can unfollow later
8. Most of these tips are stolen from others.