Great start. Keep rides at a conversational effort and add 2–3 minutes per week; set your saddle so your knee has a slight bend at the bottom and use light resistance with a quicker spin to spare the knees. On two days per week tack on 5 minutes of simple strength after the cool down (sit-to-stands and glute bridges, calf raises) to support the joints and make the cardio feel easier.
Good points but then when you test a “one-hand” fold load the seat with 10–15 lb and hang a diaper bag on the handle - folds that feel easy empty can balk once there’s weight or a bassinet/infant seat attached, and a self-standing auto-lock is huge when you’re holding the baby. For rough sidewalks, bigger air or foam-filled tires with basic rear suspension ride smoother than small plastic wheels, and take curbs by tipping onto the rear wheels and rolling the front down instead of driving the nose straight into the edge.