My aim was to actually submit our application within 24 hours, but the forms were SO LONG and I had to compress some of the files because they were too big to upload. But I would not suggest rushing it because it is prone to mistakes. I took some time off from work to actually do this.
Anyway, for medical exam, it is actually okay not to book it or undergo it yet as long as you provide an LOE (more below).
But for us, we have paid and scheduled our medical exams ahead of time. I just submitted proof of that transaction on the medical portion. For PCC, I already have it ready with me. I am unsure if you can delay that though.
IRCC actually posted this on their website. >>> https://www.canada.ca/en/immigration-refugees-citizenship/services/immigrate-canada/express-entry/documents/medical-exams.html <<<
"
If you and your dependants are outside of Canada
Don’t get your medical exam as soon as you get your invitation to apply.
We will send you a form telling you when and how to get a medical exam.
When you apply online, you must submit a letter of explanation in your document checklist instead of your immigration medical exam (IME). In the letter, you must indicate that the primary applicant or the accompanying dependants of the primary applicant are outside Canada.
If you have undergone a medical exam as part of an application in another category and/or if you have completed an IME in the 12 months before you apply, you can submit a copy of the information printout sheet or the IMM 1017B Upfront Medical Report form in your application.
An IRCC officer may still require a new IME."