I am absolutely not tech savvy but I love ghost and from what I can see of nodebb I'm impressed. I would enjoy having both together, but no idea how to make that happen. I guess there's no 'one-click install' for nodebb is there? like there is for ghost? (I just recently set up on onesmallorange )
Find out which operating system your VPS is running on with asmallorange, then go here to see how to install, then follow one of the many guides to configuring Nginx or Apache (I'd recommend Nginx, it's a little simpler), which will make everything work.
Nginx just needs a config file, which you will find all over this site with the search. If you get stuck, plenty of help available.