Docker newbie question

Does anyone have any insight on how to rclone mount a drive , and map a volume to it for persistent storage?

Good google drive sync client for linux? (grive and rclone is shit)

While planning my (personal) server I just seem to pile up more and more things to do/consider. Basically, for now I just want to have rclone, nextcloud and jellyfin, plus some usenet stuff later on. But I want to have the whole installation and configuration automated as far as possible, since I'll at first it will run in a test environment and needs to be migrated to another server at a point, possibly even another OS. So I suppose that means docker, docker-compose and Chef (any better options?). I want SSL: Traefik. User management / auth? RADIUS, LDAP. SSO? keycloak. I also need to deal with virtual hosts. And probably much more..

Since I just have basic Linux knowledge and have no real experience with any of the other technologies, I feel a bit lost. I just got to the abovementioned software due to some ddg research. I don't mind digging deep, I want to learn (which is half the reason for this project), but it's not easy to the the best way to set this up.

Does anyone have experience with Google Drive (GSuite) and rclone? I want to use it as a storage for jellyfin (emby fork) and Nextcloud, with the first being only saved there and the latter either as or with a backup.

Need an advice on syncing large amounts of small files. For starters I have 2 million of ~20-25kb sized files in dropbox. Syncing it with my local machine is a pain in the ass (API limits syncing to 4-5 files per second, so I will need at least 96 hours just to take out everything from dropbox).

Recently I started looking into self hosted cloud solutions. I fiddled around with nextcloud but it's client limits syncing to 5-6 files per second as well. Accessing nextcloud via webdav from a rclone client I was able to up the syncing speed to 15-25 files per second but that's all.

Any solutions where I should host 2mil of files and would be able to sync them fast to my own machine with some cloud client when I need it to?