Here are our "top three" ways for accessing Linux machines via SSH.
We only, ONLY, use SSH keys. Passwords are dead. Please configure your SSHd properly.
You will need to create these keys on your Windows system.
This tool will make SSH key files in multiple formats, usable by the different tools
Putty seems to be the most popular tool of them all. It's been around since 1998 and is still very actively maintained.