To add a friend, you would need to login by going to My Golf and enter your login details.
Once you are logged in, you will see Member Search field on the upper right hand side
Type in the name you would like to search
By default, this is filtered by your home club. If the player you are searching for is not a member of your home club, you could click on the "x" button to remove the filter.
From there you could see the search result for you check and "Add Friend".
If you only want to see the details (not adding as a friend), you could just click on the name so you could view the player's details.