i’ve swapped chainrings a few times on my creo. nothing needed to be removed, although i have small pedals.
1) release the clutch on the derailleur, and pull the chain off the chainring and over the crank, getting it out of the way
2) unscrew the 5 bolts
3) remove the chainring, it slips over the crank arm and pedal just fine
4) put new chainring in place
5) repeat 5x : put a drop of loctite on threads of bolt, fit pair of bolts together in holes through chainring and spider. hand tighten
6) with torque wrench, tighten each bolt in a “star” pattern to the specified torque. star meaning you tighten one and then the next one you tighten is not the one next to it, it’s across the ring from it.
7) if the new ring is more than 2 teeth different, use a chain tool to pop the chain apart and remove or add links.
8) replace chain, engage clutch, ride!