If this is your first time on the #Fediverse, the instance (server) that you are on, may not be all that suitable and that is fine. It's OK to change.
Check out https://fedidb.com/ or https://fediverse.observer/ for different servers.
Avoid the 'official' Mastodon servers (mastodon.social and mastodon.online) where possible. Moderation is lacking to say the least.
#Hashtags are your friend. There is no algorithm with the Fediverse to "de-rank" posts with too little or too many hashtags.