If you want people's advice about any topic, type your question and tag it with #AskFedi, which is kind of like a bat signal for advice on the Fediverse ?
If you want a post to be shared, try adding "Boosts appreciated!". Some servers may even have an emoji for this such as :boost_ok:
By the way, remember that if you want your post shared publicly you have to give it a Public or Unlisted visibility setting. (More info about post visibility settings here: https://fedi.tips/who-can-see-my-posts-in-mastodon-how-do-i-send-dms-in-mastodon/)