Looking for a good course on production deployment

Hey guys! So I'm in the process of finalising one of my web applications built with Node.js and I'm trying to work out the best way to deploy it and start accepting BETA users.

The thing I'm struggling with is finding a good course on how to setup a Linux server and deploy an app to production. I went through tons of youtube videos but most of them are just introductory and focus on deployment for 'development' purposes rather than 'production' so I don't know whether the concepts taught are good enough for production purposes. What I'm trying to say is, the last thing I want is deploying an app, accepting real users (customers) and then running into issues with it that I can't fix (e.g security issues, updates, scaling etc etc)

Does anyone know a good course or someone that I can pay to teach me how to properly deploy my app for production?

Thanks a lot in advance!