For Hope,
May I ask:
1. This mail from SGVO, does it have your UCI number?
2. what is the contents of the mail, does it say "we received your application"?
If you answered yes to both questions, it is your 1st line update (AOR). That is good news.
To your question on what you should do - I think you should CELEBRATE! Congratulations.
Next step, you will get 2nd Line Update (VO will start processing your application) and then send you a Medical Request (MR), Right of Permanent Residence Fee Request (RPRF) and Passport Request (PPR) post which your PR stamp will be in your Visa and you can land in Canada.
CONGRATULATIONS !!! Party Time!
Regards,
Rick