I'm not hugely savvy with this stuff but have set up VPS instances on Digital Ocean many times and followed lots of instructions etc. So I feel fine about getting set up with Nextcloud on a server I'm renting from Hertzner. I'm just stressing about how much of the time it is likely to crash or go wrong - when this stuff happens at the moment I just email tech support at Dropbox. Very ready to leave them behind but also can't afford to not have access to my data.