Xiao BLE Sense Beginner Projects

I’ve been putzing around with the Xiao and just ordered the BLE Sense flavor. I am still at a novice point with the Xiao and I know absolutely nothing about bluetooth save how to connect my headphones to my cellphone. I am looking for projects which might help me understand it better. Format doesn’t matter. I can read or watch and equally fall asleep, er learn from either. Any resources you find helpful would be greatly appreciated.

I probably should have clarified that I have worked through most of the exercises in the wiki. I am really looking for some additional projects I can follow along with, because that’s how I learn best. I appreciate your response, though!