Welcome!! Your villagers will move out every now and then (as long as you have 9~10 villagers in your town I think) and new ones will move in!
There's a few ways to get new villagers:
- if you have under 10 villagers, you can adopt a villager from another town when they're leaving. They'll be packed up in boxes and you just talk to them and tell them to move to your town
- if you have 8 villagers, a random 9th villager should move in within a couple of days
- once you build a campsite, sometimes an animal will camp there and you can invite them to your town as long as it's not full
- if you visit a friend's town I think one of the villagers have a chance of moving into your town randomly (when they decide to move out of your friend's town)?? not 100% sure on how this works, but it's happened to me a few times
- scanning in amiibo cards let villagers move into your town too!
I hope this helps
P.S. the easiest way to get Fang is to probably adopt him from someone in the Villager Trading Plaza :0