Yes, you can replace the patterns included in the course with any other patterns from the list:
Skirts: Cecile Skirt, Malika Skirt, Vilora Skirt, Agnia Skirt, Blake Skirt, Jane Skirt
Dresses: Leonie Dress, Asel Dress, Odette Dress, Esther Dress, Violet Dress, Odelia Dress, Lynne Dress, Buffy Dress, Eden Dress, Helga Dress
Blouses: Jenna Blouse, Demi Blouse, Fritzi Blouse, Cynthia Blouse, Laima Blouse, Kaia Blouse, Joslyn Blouse
Trousers: Lora Trousers, Adeline Trousers, Karen Trousers, Jaqueline Trousers, Daphna Trousers, Anne Trousers, Ruth Shorts, Edna Trousers, Halsey Trousers, Heather Shorts
Blazers: Riana Blazer, Eteri Blazer, Nancy Blazer, Jackie Jacket, Fernanda Blazer, Marisa Blazer, Bryce Blazer, Janet Blazer, Mercy Jacket
You can find more information on switching patterns in the corresponding lesson of the Introductory unit.