...the design doesn't look appealing because it looks cheap. You really need to research what is out on the market as far as the design goes. If I saw these on the shelves, I would not want to purchase because nothing about it looks appetizing to me.
Look at designs on the dieline. Heck, look at Wondermade Marshmallows. When I think of marshmallows, I think light, airy, fluffy. Your design is dark and boring. An outline of a fit arm is cliche and overused, and here it's not used well.
This is a university project. So REALLY PUSH YOURSELF. You have absolutely no limitations in university, so have fun with this and just go as far as you can. You have nothing holding you back from truly pushing this far.
With all this said, we aren't here to do your project for you. We can help give you advice but you also have to learn now to make your own design decisions because that's going to be expected of you in the real world. Just because a typeface is clean and legible, doesn't mean it's right for the project.
Did you create a mood board for this project? If so, I would like to see it here.