In Linux, you don't usually have to restart your computer when you finish installing/updating software/packages, you just restart their service. For example, to restart Apache you type: sudo service apache2 restart, which will then update as needed, or: sudo service samba restart, to restart the samba service.
With Samba, you define share and set options, like authentication and permissions, and share your defined shares on your LAN.
But I will go over a generic install, first we will need to install Samba (Which you've already done), then edit the config file, then restart the Samba services and we should be good!
Scroll all the way to the bottom and type:
sudo nano /etc/samba/smb.conf
Don't type the text in the parenthesis.
Press "ctrl+x", and possibly type "yes" if it ask, to save the file.
comment= My New Share
path= /path/to/directory (Can be any path, ex. /home/chris/share)
guest ok= yes
read only= no
That will make an open share that anyone can access and put/take anything from it. We can lock it down and make it more secure if you want, just let me know and I will show you how to do that.
Now we need to restart the samba service, type:
Here is a free online book of Samba that gets pretty detailed, so I would recommend looking over it,
sudo service smbd restart
sudo service nmbd restart
That should get you up and running with a Samba defined share that anyone can access when they connect to your LAN, let me know if you have any troubles and I will help!