I have a simplicity "easy" pattern that I like. It has long sleeves with a botton down front or a polar fleece no button top. I'm sorry I don't remember the pattern number. I do know there are several brands with a simillar pattern and all of them seem fairly easy. I have issues with sewing button holes and I really like the pull on fleece (or knit) tops! ...Oh, duh. You said gowns! This pattern is for pants and tops. Sorry! I would just have a look at the fabric store. Most patterns marked two hour or easy will probably be okay for learning.