Tap the 'Feed' icon on the bottom bar (bottom-left button). This is the screen where the social activity of the Hole19 buddies' that you follow will appear in conjunction with the personal activity that you share. Everyone who is following you will be able to see your activity in their 'Feed' screen and, in the same way, you'll be able to see the activity of the people who you follow.
To add a buddy, just tap on the icon on the top-left corner and you'll be presented with four options:
1. Add buddies from the suggested list;
2. Add buddies from your Facebook that already use Hole19;
3. Add buddies from your Twitter that already use Hole19;
4. Search buddies by name.
If you choose the 4th option, just tap the 'Search' icon on the top-right corner and type in the name of your buddy. Once it appears, just select the little icon right next to the name and you'll be following this person.
You can visit your buddy's profile just by tapping on the name (if it's public or if the buddy accepts your follow request).