(This was my path. This may not be yours.)
If you want to start somewhere, start from the machine you already have: Your PC.
Work up to using a VPS. A DigitalOcean droplet or a Hetzner VPS, or any other provider.
Learn how to generate public-private keypairs. PuTTY comes with a tool to do this (puttygen.exe). Otherwise, learn how to use ssh-keygen.
Learn how to move your private key securely to the VPS. Learn how to disable password logins to your VPS, & moving the SSH port to anything > 10000.
Do this for multiple VPSes.
(This was my path. This may not be yours.)
If you want to start somewhere, start from the machine you already have: Your PC.
Work up to using a VPS. A DigitalOcean droplet or a Hetzner VPS, or any other provider.
Learn how to generate public-private keypairs. PuTTY comes with a tool to do this (puttygen.exe). Otherwise, learn how to use ssh-keygen.
Learn how to move your private key securely to the VPS. Learn how to disable password logins to your VPS, & moving the SSH port to anything > 10000.
Do this for multiple VPSes.