I think you'll have little difficulty in changing from high to low wing. (But I'm biased having learned on low wings)
Low wind should cause little difficulty in navigation either, as pilots view is usually not obscured by the wing, unless you are looking 90degrees to heading.
FFF mentioned about fuel being delivered by a pump. One important point about this is that it usually means you have to select fuel from left or right tanks. There is usually not an option for both tanks, which is available on many high wing aircraft. So remember to change tanks from time to time.
I wouldn't worry about it. I agree with Kermit...people have more difficulty going the other way (myself included
)