admin – How to connect to the server via SSH

I'm new to WP and Linux in general, so it's probably a fairly basic question. I just created a website on WP.com (Professional Account) and now, when I try to access the WP Admin page from the browser, it redirects me to the login page to my website. He then refuses me when I use my username and password (which will also have administrator rights). I have studied it and it seems that I need SSH on the server to delete a plugin, but I do not know how to find the address to SSH?