WHHi!! So glad you’re both here! Check out the #WCT hashtag, and also look for other #introduction posts! You can scroll my page to find intros I’ve shared, and there are lots of #MastodonTips too!
The big thing is using hashtags to find others who share your interests. Also, boost (RT) any posts you want your followers to see. (Your likes won’t show up on your friends’ TLs unless you also boost the post.) There aren’t algorithms, so it might feel like the early days of FB.