As this is a beginners forum...I wouldn't recommend a gasser for your first or second airplane.....
A high wing trainer with an instructor would be much better.....
If you already know how to fly then your best bet would be to team up with someone that already knows gas.....as you do set the airplane up different, throttle and the fuel tank.
As far as a fuel oil mix.....there are many opinions as you can see...but the majority seems to run at break in 32:1, then go with higher gas ratio after a gallon or 2..