C.T.
Hi M.,
I don't think it's too early at all. I started my DD at 6 months because she was on goat milk so I knew when she was having a BM. It sounds like Alexis is ready. It's so much easier to go with them when they're ready than not. I nannied for 15 years and I remember one family in particular the parents weren't ready when they're DD was and she lost interest. When the parents were ready it was a real struggle. She would be doing great for me all day then mom would come home and put a diaper on her and that was the end of that.
The weather is warm enough for her to go around w/o a diaper. I would give it a few days to see how she does with it. She may well be ready. Good luck!