You can go on Etsy on computer to You > Purchases and reviews and look for the order.
Click Download Files. This goes to the Downloads page for all the files attached to your order. The downloads work only on a computer, not a mobile phone or a tablet, so make sure you are trying to download on a computer.
There should be an email from Etsy with a download link as well.
Hope you have found your files!

That is right, all my patterns are protected from editing with a password. In such way I am protecting them from being stolen.
If you just open it and uncheck the layers, it shouldn't request a password, because the files are allowed to be read, but not to be edited. If you are trying to open it with Illustrator or Photoshop (editing apps), then it requests a password, because the file is protected from editing.
Just open it with Adobe Acrobat Reader (free app), you don't need to edit the file, but only to read the file. There are instructions in the instruction file on how to do it.

Letters are cup sizes, that correspond to a bodice size in the file you are opening. 1 file = 1 bodice size with different cup options.

In the instructions there are 2 size charts. First, you determine your size in general (bodice size), I recommend doing it from your underbust measurement.

1 pdf file contains one bodice size in general, all these patterns have the same waist and underbust measurement. So you open a file EU 40 for example, and choose a cup size (letters) for this exact dress size, these lines mean a cup size. A cup size affects all the pieces in the pattern.

You can uncheck unnecessary cup sizes in Adobe Acrobat Reader (using layers), it is much more convenient.

No, unfortunately, I don't make custom patterns. I offer only patterns I already have.

Non, tous mes patrons sont en anglais uniquement.
vous pouvez essayer de regarder une vidéo avec le processus de couture et activer la traduction des sous-titres sur YouTube.

Yes, all of my patterns include 1cm seam allowance. Even more, the most of my patterns include a seam allowance line and an actual piece line, so you can measure and figure out how the piece should look in the finished way.