Make your folder

mkdir ~/happy
chmod 0700 ~/happy

Set up samba

sudo apt install samba
sudo nano /etc/samba/smb.conf

# Adrian's share
[happy]
  comment = Welcome to Happyland
  path = ~/happy
  read only = no
  guest ok = no
  browsable = yes

sudo /etc/init.d/smbd restart
sudo ufw allow samba
sudo smbpasswd -a <username>

Then connect to your new share!