Edit: this is all meant to come across in a friendly and helpful way :)
I understand this. You cant tell the tone of text, and so it can be interpreted many different ways.
Get a feel for what people want to support and join. And what annoys people. Even if a RP has a really interesting plot, if the creator doesn't write well, or doesn't use any punctuation or proper spelling, I pass.
Also, what are people comfortable RPing? I wouldn't join a RP where everyone is twelve years old, and we own racehorses or something.
And even though a RP about hyenas or rodents sounds interesting, I don't know much about either, and would feel limited when writing something. (These are just a couple examples, not meant to hurt anyone who does/has RPed these subjects)
Similar goes for suggestions. Most people like HEE the way it is, and suggestions are for things that players think would benefit everyone. For example, a quick name change. Maybe little things/fun additions like new tack patterns, or a new type of appaloosa.
I looked through multiple of your suggestions, and I see a lot of them are locked.
Things like twins and diseases are shot down, and the pinned thread on the suggestions forum says don't suggest it. Theres also a good amount of suggestions of yours that already exist in the game.
I think you will have more success if you double check that it hasnt been suggested, and doesnt already exist. For something thats not a new coat or a new tack pattern, take some time to write a post thats clear and well thought out.
Most of the time if you have a good idea, people will support it!
I agree with finding a friend group. I have a few close people that I can PM and chat with, RP with, poke, spam with doggo pictures, whatever! Its nice to find people you connect with :)
And if needed, you can always take a step back from HEE for awhile, and come back when you feel ready.
Good luck!