Ok I see well I got some 1/8” to practice on also. A little step down from the 3/16 Trying to figure this out the best I canyep. To much heat (volts) and penetration (wire speed) will blow right thru the thin stuff.. Thinner wire will help with thinner material too. Sometimes you can get away with moving a little faster too.
No shame in pulsing when needed!! I pulse weld thin sheet metal, like the cab. Just don't do it on structural shit to "stack dimes" for aesthetics.