What Is the Best Forum Software for a Beginner?

Hi everyone, I want to start my first online forum but I’m not sure which software to choose.
I’ve heard about phpBB, MyBB, and vBulletin but don’t know the difference. Which one is easiest for beginners?
Budget is 20 USDT monthly. Is GTHost.com vps reliable? Will it work well for my needs? Also, how much disk space and RAM would I need to get started?

I know GTHost.com VPS can be perfect for many clients who rent servers for VPN businesses.
Ubuntu, Debian, Centos, Rocky and more – you'll have a wide variety of operating systems to choose from.
Intel Xeon processor family with NVMe drives with an essential performance fit to handle the business workload.