High wing / Low wing
Hi Peterw3001,
The only difference is that you can't see anything like as much of the ground close to your track as you have been used to. So you have to be confident navigating using ground features that are further away.
If you have got into the bad habit of navigating by relying totally on features close to track then you could frighten yourself. You need to be confident navigating using features at greater distance from track. Some cross country time with an instructor might help.
Actual handling is little different, except cross wind landings.
I should say, provided you are confident about your navigation, conversion to low wing will be little problem.
Broomstick.