If you have instructions, and have specific questions for the step that you’re stuck on, then it will be a lot easier for the forum to help you.
And we do want to assist you. But please keep in mind that this is similar to you wanting to learn to use Photoshop, and you also ask questions about photography, where Patternmaking = Photography and Valentina = Photoshop
So this is why it’s important that you have patternmaking instructions in a book or PDF for the garment you want to make. So we’ll know how to help you!