RE: flying With the wind..
Congrats on your maiden and it is great that you are not afraid of flying in the wind. You are probably right that you are not judging the planes airspeed well and are getting a bit slow going downwind. Try flying with more throttle on windy days.
I fly at a runway where the wind is in my face often so that base legs can be a problem. Visually, I think I have plenty of airspeed but I have noticed there is no energy left as I turn final and land. It is tough to judge the airspeed visually as the wind can be such a large percentage of it.
Just keep flying! Good to see your are thinking of the actual airspeed of the plane.