First Ever Homemade Cake!

I made and decorated my first ever cake from scratch (funfetti) for my daughter’s first birthday! It’s not perfect but I think it’s a not too terrible job for the first time! I wanted to do a tester before I make it for her actual birthday party coming up soon. That one will be 3 layers instead of 2 and I’m wondering if I should pipe icing on the bottom instead? It’s also sickeningly sweet, I used the Butternut Bakery recipe, and am wondering if there is a way I can make it a bit less sweet. Any thoughts or advice? Thank you!