You're welcome! Reply to as many comments as you can with comments which add value (i.e., minimize the "Me too"-type 2-word comments). That's how fellow Hivers get familiar with your name.
Actifit would be perfect for you. Nearly all the posts include photos, and you can include photos which simultaneously fit in the community and display your form in action. Just don't wear "I give up" sweats or a burlap sack when you do your Actifit photos.
Many Hivers you wouldn't expect also play Splinterlands. That's definitely a way to get noticed here. Some players even post about their experiences playing the game. Those who do well in the game also use it to finance their other Hive activities. I don't know enough to assist in either, but there are plenty of people who do.
(Splinterlands cosplay? I don't know if that's a thing, but maybe it can become one!)
Good luck on your Hive journey. I hope you enjoy the communities you join.