If I may make a suggestion:
put your mag on 2, 3 or even 4 (for the sake of an example) and just leave it there.
Get the hang of casting using the centrifugal brakes first - you will need that skill before using the mags as well.
Once you feel very comfy casting with only the centrifugal brakes, start easing the mags off once the lead and bait are airborn.
Mags take a bit of getting used to and if this is your attempt to get your head around multi casting it may make sense to tackle the two parts of the cast separately.
Mag reels are mostly wasted on me - on my Abu 6500 C3 CT Mag High Speed (what a mouthful
that is

) I leave the mags off completely or, if I'm casting into a high wind, I put it on level 2 and leave it alone. That's why I stick mostly with centrifugally braked reels which, if you get your head around them properly, can cast far further than I'd want to fish at.
Good luck with it, and if I could add one more point, concentrate on a smooth cast and release which goes a very long way to ironing out birds nests.