You should zig zag slightly across your surfaces
keeping a constant bead of penetration at all times. Tisnt easy without a decent welder
Another thing that'll help especially when outside is turning the gas up
If your finding you can get a happy medium and you have to go higher you'll have to move faster as you blow holes pretty quick.
Upping wire speeds cancels your movement out and you'll still blow holes. I tend to to go lower but a higher speed wire and slow movement
I'd be better off showing you rather than explaining