Big accomplishment. I've never attempted to remove a wheel or tire or tube from a bike before. I had a trainer tire installed on my bike for the winter training season and spring is coming on fast so I needed to remove the rear wheel from the bike, disengage the brakes, derailleur and chain, followed by deflating the inner tube, removing the tire and tube and replacing the trainer tire and tube with my normal tire and tube. Then the whole works was put together in reverse, mount the tire/tube, mount the wheel to the bike, engage the derailleur and chain, put the brakes back on and ensure all works, rolls, shifts and stops.
I took a quick nighttime spin and it shifted, rolled, stopped and most importantly the wheel stayed on the bike.
I have such a sense of accomplishment I feel like I can tackle the world! Here I am in my middle years and this is the first time I have ever tried this and I did it. Of course attending Bike repairs 101 and 102 over the winter helped.