CONVERSION OLD TO NEW COURSE

I WANT TO CONVERT FROM OLD TO NEW COURSE FOR FINAL.I HAVE BASICALLY 2 QUERIES:

1) DO I HAVE TO ENROLL FOR ADV ICITSS NOW BEFORE APPEARING FOR FINAL OR I CAN DO IT LATER AFTER FINAL? IN THIS REGARD I WOULD LIKE TO CLARIFY THAT I HAVE 100 HRS ITT BEFORE PCC.

2) I AM WORKING IN UCO BANK FOR THE LAST SEVEN YEARS. IS IT NECESSARY TO INFORM INSTITUTE IN FORM 112 ABOUT MY ENGAGEMENT?