Once you've decided on a server and have login details. There's a bit of an infrastructure setup that's required to get the server production ready.
Note that there are always many ways to accomplish tasks and each sysadmin can have their own preference for tools, scripts and automation. This guide follows basic principles to help entry-level users.
Security
One of the most important things when running a live production system with funds on it is to keep it secure. By following common principles and best practices you can ensure you're protected from most hack attempts and at least make it difficult for bad actors to infiltrate your systems.
Disable Password Based Login
Generate ssh keys so that you can only login to your server with keys and never a clear-text password.