Congrats on your first DC sale!
As soon as you've shipped the item, mark it as shipped. That's what starts the process to get your money to you.
After you've marked the item as shipped, Etsy only has a 1-day wait now before your money "becomes available." However, then you need to wait till the following Monday for Etsy to deposit the money to your bank account automatically. That process will likely take a day or two until the money shows up in your bank account; just keep an eye on your bank account via online banking and you'll know when it's actually there.
Since you're shipping on Monday, chances are that if you choose to wait for Etsy to do the automatic deposit, it may be NEXT monday (10/29) for the automatic deposit ... or you could probably go ahead and schedule an earlier deposit. The info should all be on your Shop Payment Account page.
I just made my first DC-paid sale on Friday so I'm new to this too, but that's my understanding of how it works anyway!