I was, I found a guide online that worked.
Step #1. Go to Settings → scroll down and tap on Messages and turn off iMessage (also disable FaceTime)
Step #2. Turn on the Airplane mode. Wifi will be turned OFF automatically.
Step #3: Turn ON Wifi.
Step #4. Head back to Messages and turn-on iMessage.
Step #5. You’ll be prompted for your Apple ID if you haven’t added it yet. (else, you don’t get any notification)
Step #6. Now, head back to Settings and turn OFF Airplane mode.
Step #7. Mostly, you’ll be shown a notification that says ‘Your carrier may charge for SMS’ – Tap on OK
Step #8. If not, go to Messages, turn OFF iMessage and then turn it ON again.
Step #9. In a short while, iMessage should get activated.
Step #10. You’ll see a greyed out number and an email ID. A little later, the number should be checked and that’s it.
Hope this helps. Now if I can find a Apple Music fix lol