Why not both, welcome to nostr. Damus is just one of the many clients to access and read and write to the nostr protocol. It is my favorite app on iOS for nostr, but there is also primal and Nostur on iOS for social media. Once you get the hang of one, you should try out some of the other clients that run on nostr… the best comprehensive list I know of is https://nostrapps.com… but most importantly, have fun. Find weird people that post cool things you like, follow and reply on their notes, and post notes with cool things that you like, and people will find you and follow, use hashtags to find cool things… hashtag grownostr is a good starting place.