Hi, Matt
These are all good suggestions. I have been flying these things for nearly 60 years. I still experience a little dizziness when I have not gotten to fly for several months.
One thing that works is to measure the amount of fuel you put in the tank and reduce it until you conquer the dizzys. It is called "short-tanking". Time your engine run on a full tank. Put in half as much fuel or even a third or a quarter as much. A one minute flight is a long time when you are starting out. After a few successes, increase the fuel load enough to give you, say, 2 minute flights. Work your way up to a full tank. I am currently flying a plane that I have never filled the tank. Five minute flights are all I need these days to have fun.
Make your flying lines as long as you can while still having control. The longer the lines, the slower you spin around.
Slow your engine down by running it a little richer. Not so slow that you lose control but slower. The slower you spin, the less likely you are to get dizzy.
Mostly, practice. The more you and that eight year old fly, the more accustomed you will become to the turning and the less it will bother you.
Don't forget to post a note one of these days with your progress. We have all been there. Post a picture. I love watching youngins fly!!!
Bill Marvel