The Shimano XTR PD-M9100 are very nice pedals and work very smoothly.
Although, as mentioned above, there may be reasons not to dive into the deep end. Perhaps a cheaper starter set.
I went from decades of toe clip use to SPD pedals. No "flats". I have ridden on occasion short distances with street shoes, but 99.9% of riding is with the cycling shoes and the SPDs.