Hello dear,
once you log in to CIC after id password input followed by accept terms and security question , You will find first tab of My information in which your info will be there.
After that you will fins what will you like to do today, in that you can see first tab of visitor, study or work permit.
By clicking on that, you cam apply for your study permit. After uploading all the required documents, you can submit your file after digitally signing ( writing your name ).
Then the updates will be provided to you by CIC. Once the update or any message is there in your account, you will be notified by CIC via email id you have provided.