Hi Rajshree, I went thru those steps and still didn't find the redemption code or serial number. The status of my purchase says pending and it'll take 24 hours to process. I'm not sure what to do at this point.
You have purchased Creative Cloud single-app membership for Adobe Premiere Pro (one-year), it does not need serial number. You can just install & activate it. You have 20 Gb of storage space which is for CC.
CC mostly asks for serial number if:
1. There is no CC registered to the ID with which you had signed.
2. There are entries of Adobe in Host files of the computer.
3. The activation count has exceeded more than 2
Please refer to: