Thank you very much for the advice. I think maybe I was reading too much of threads which made be overthink. But I really appreciate your response as I feel relaxed now and want to thank you for that.
Regarding my surname, I have started using that at work mainly in my email signatures like:
Jevan Boparai
Data Analyst
Xyz Company
I will be adding my surname via legal name change soon as I have realized the importance of surname in western countries. So, even if I am using my surname at work emails, I don't need to update IRCC?
As long as your official names you put on documents and such aren't any different. You are fine. For example if you had a health card or another name used for some official/immigration/identification document somewhere else then you would have to mention. Use your best judgement, but casual/pet names aren't a worry here and don't need to be mentioned.