To answer your first question directly: GTHost is actually a very solid, reliable provider with great network speeds and uptime, but there is a catch based on what you mentioned—their VPS plans are entirely unmanaged.
Since you noted that you aren't super technical, an unmanaged VPS might give you a pretty big headache. With an unmanaged host, they just hand you a blank server with an IP address and root access. You would have to manually install the operating system, configure the web server (like Nginx or Apache), secure the firewall, set up the database, and install the forum software (like Discourse, phpBB, or MyBB) using the command line. If something breaks or an update goes wrong, their support won't fix it for you.For a small forum project where you want an easy setup, you have two much better paths:
Managed Cloud VPS (Recommended for beginners)If you definitely want a VPS for performance but want a point-and-click control panel, look at providers like Cloudways or use a standard VPS (like DigitalOcean, Linode, or Vultr) paired with a server management panel like RunCloud or Ploi.They handle the server security, updates, and software stack installation automatically. You get the power of a VPS with an easy-to-use graphical dashboard.
High-Quality Shared/Reseller Hosting with LiteSpeedFor a small forum starting out, a standard VPS is often overkill. A good Shared or Semi-Dedicated hosting plan with a cPanel or DirectAdmin dashboard and a 1-click script installer (Softaculous) will let you launch your forum in literally two minutes.