Cosmos's lemmy app is outdated and doesn't work, yunohost is the only webclient type thing I've tried that has lemmy and works. Yunohost also has most other services like sharkey, pleroma, peertube, etc. and lets you easily install multiple services on one server with different domains. Only downside is it doesn't have multiserver management like the rest, but the rest have no app support for fediverse stuff outside of mastodon.
If you don't know how to do a lot of the docker stuff yourself, coolify, dokploy, runtipi, etc. aren't really a possibility, they don't work with ansibile, or the easy install without modifications (that idk how to do, I have yet to suceed)