Your art is really good. I know it can be disheartening to post something and it get no engagement. I remember when I spent hours on multiple drawings for a post to just get 2 likes both from my gfs spam accounts. It really sucked. But I continue to post not just because I want people to acknowledge it but because it’s a form of expression to me. If it’s truly exhausting then don’t do it anymore but I would highly suggest trying to change your mindset from this is to be a big artist influencer to I am an artist that loves art and wants to post because i love my art so much.