There are various technical alternatives (ActivityPub-based stuff like PixelFed/Loops/Mastodon/GotoSocial/Sharkey/Akkoma/something else on the Fediverse)

But would you take the plunge of self-discovering different content, which might as well be none of your topics of interests? Would you be acquainted of vastly different UI/UX such as the lack of recommendations, and the technicality of federation? And lastly, will you find it a place with communities to socialize and content to enjoy from in the long run?

I think trying out on a public instance would be a good way to answer those questions. PixelFed most closely resembles Insta, but the other ones can do too. Then you can consider selfhosting your own