Well BlazBlue does have an in-game tutorial and challenges to learn about how the game works and what the characters can do. I suppose in that sense BlazBlue does its best to be welcoming to beginners.
With Guilty Gear the door’s already open, you just gotta walk in and help yourself.
Blazblue generally wants longer combos, while Guilty Gear has a greater focus on neutral. It’s more subjective, depending on what comes naturally to you.