Congratulations!
Good call on going short term lease with RWD so you can enjoy your car in the spring and summer, and then by March 2023 you can switch to an AWD like you said. Also in 2023 you have an option to go with a G80 M3 AWD because it'll have the LCI tail lights.
I'm going for the AWD G80 as I want the car to put down the power from a launch. I'm interested in quick acceleration off a light and still be able to drive an engaging ///M that's capable of putting a smile on my face in all types of driving. I see this G80 as a transition to electrification for me so I don't mind that it's not a pure RWD ///M with a 6-speed manual. I've had my share of those in the past. Waiting also gives me the chance to see a few colors & wheel setups in person before I finalize my order.