Opening an Apple ID is very simple and easy. Just follow the below steps:
Step 1: visit the Apple ID website Here
Step 2: Tap or Click Create an Apple ID
Step 3: Enter your first name, middle name, last name, Apple ID, Password, Security Questions, Date of Birth, Rescue email address, Mailing adress.
Step 4: At the bottom of page just click Create Apple ID.
Now you have your own Apple ID and will able to access to all your iPhone apps that required Apple ID.