Sounds like you have a good start! Where do you live? If you live outside the deep South, all mantids are currently very, very young, and it’s tougher to tell the species apart when they are so young. I’d have a hard time telling exact species right now!
I think the first few times using a nature guide, whether online or in book form, when you are just getting started learning about something, are just the hardest times. It does get easier! Once when we were learning about trees, very, very early in our homeschool walk, we decided to label all the neighborhood trees. How hard can THAT be??? LOL. Well, it can be tough. We agonized for hours over WHAT species of oak that was across the street, WHICH kind of maple was on the corner, and how, given how uncertain we felt using the field guide, we would EVER know for sure. Once my oldest asked, “Mom, you really don’t know what you are doing, do you?” LOL But we did get better, and now call them out from the car as we drive by. It gets easier!
Michelle D