You can sign up for a VPS here: https://heliohost.org/vps/ There may be a wait list, if so you can sign up for the wait list by clicking on a full plan.
Keep in mind that a VPS and shared hosting are entirely different products. A VPS comes with a bare install of whatever OS you want, you get SSH access to it and you install everything yourself. It has no control panel or even a web server like Apache by default, you'll need to install those if you want them. Krydos can usually help if you don't know how to install the software, and there's plenty of free control panels you can install on a VPS if you'd prefer something a little easier to use than a command line (KeyHelp and Hestia are two common ones).
Morty will offer a more conventional Plesk-based shared hosting upgrade path once it's built.
I'll also have Krydos take a look at this for you since he deals with most of the VPS stuff to see if he has anything to add.