That sounds like a good plan. Take it slow, use your inhaler as needed, and check with your doctor if you're still having asthma symptoms during exercise. I had to try a couple of meds before I found what worked best for me (1-2 puffs of albuterol about 10 minutes before starting my workout).
I think if you are patient and manage your asthma well with meds, even with crappy lungs your wind will improve. I went from not being able to jog 1/4 mile without wheezing to running a 5K and feeling fantastic. Hang in there!