Specific niche does not matter so much, in my opinion. I post on everything and anything.
Just keep posts coming consistently, so people learn that they can always expect something new from you. It will take time, of course, but it is a good investment.
Also, comment a lot and make friends.
Appreciated your answer, I'll try something, it's nice that whales like you are with us
Technically not a whale, but I know what you mean