I recommend going with Backblaze, they’re cheap and in my experience very reliable so far. If you’re looking for other alternatives, you could get a storage box from Hetzner. It’s not S3 compatible but instead supports Samba, FTPS, SFTP, Borg, Restic, RClone, and others. I suggest avoiding Wasabi due to their strange / shady? pricing model where you pay 3 months of storage cost for every deleted file.
Lemmy.world is considered the “normie” instance. Even if you manage to find another instance, it won’t matter that much anyway since most interactions are from federated users. The only way to avoid leftist views on Lemmy is to avoid politics completely (which isn’t viable).