Hi, @zhandosweb, and welcome to our community site. (Also, your English is much better than many people I know who speak English as their “first language”.)
Regarding what is included in the Starter plan (which is also known as the “free plan”) there is more information here:
There is no limit on the number of sites you create at Netlify and you may create as many sites as you want.
There is a monthly bandwidth limit of 100 GB for a team. This limit includes all sites for the team. It is a team limit and a “per site” limit. If you have 11 sites and they all use 10 GB monthly, this will put you above the 100 GB limit. Additional bandwidth is added as 100 GB add-ons and they are only billed for the month where you exceed the bandwidth limit.
If you don’t go over the bandwidth monthly limit and you don’t use any paid add-ons (for example, Forms Level 1 or additional team members), your monthly costs will be $0.
Regarding SSH access, this isn’t possible with Netlify. You can deploy directly from the command line using the Netlify CLI tool, however: