After not being too lazy, I found what I needed. These are probably basic things for advanced users:

• I couldn't access protected shares with my root username/password because I didn't add that user to samba system (it seems that it doesn't take automatically ubuntu users, and its user/pass system exists by its own which is a good thing). To add a user just use smbpasswd -a [USERNAME] and then type the new password.




• For listing all local shares and their paths just access /var/lib/samba/usershares folder and there you have all configuration files for every single shared directory. Inside the file you have fields path (with the path to your local directory) and guest_ok (y/n type to permit guests) which you can edit manually.

I will not lock this topic yet, waiting for improvements from other users (if there's anyone who will read this). I just wrote this answer to help some other lost noob like me ;)