Is it a good idea to partner with this person to open an Etsy shop?

A friend of mine talked to me about wanting to partner with me to open an Etsy shop after she saw a FB video in my language on how to make money online. None of us has any experience with Etsy, and the friend doesn’t even know anything about America apart from the usual movie stereotypes. I asked her what her idea for a shop was, but she said she would discuss with me tomorrow. Currently I know nothing about her plan apart from that she wants to design and sell cute stickers.

The thing is, I partnered with her some time ago, on an unrelated non-profit video project for a competition. It was a short funny video to promote a product. She was a really nice and enthusiastic person, but she severely lacked knowledge of how things work. She constantly made decisions that made me sweat heavily. For example, her idea was to make a backstory for the main character to explain how he was “cursed”, and she made a Satanic background right at the beginning of the video, and a lengthy description of several deaths, in a funny video! She also had a very skewed logic and refused to give up on her ideas, even when it was explained to her why she was wrong. There were several other incidents with the video, and that really colored how I felt about partnering with her.

Don’t get me wrong. I like her a lot. She’s a great friend and is supportive of me in things other than work. And even during the video project, she was willing to do extra work when I was too busy with real life. It’s just that I’m worried that she doesn’t have enough professional skills to work on something serious like selling online, and our partnership could lead us to the same path as the video project, only much more serious because it will involves money. Part of me has the feeling of “this time it may be different”, but the other part just doesn’t want to do it.

I’m to meet her tomorrow. What should I do or say?