You should have more than one fedi account. For sure a mastodon or misskey, maybe a nodebb or bookwyrm, possibly Pixelfed or Vernissage, if you’re feeling spicy a wanderer or funkwhale – cut loose, try out a few services. If you wanna have multiple lemmy accounts, no-one’s gonna stop you but a lot of people that do run multiple are kinda lame and end up using them as sock puppets and to manipulate voting and stuff so don’t be surprised if folks are skeptical.