ever tried welding before ?
ive got a sneaky suspicion its bright when welding the steel so you panic and speed up across the steel
also bad gasless wire does what your seeing as well
a bit of advice stop trying to weld that and try to weld a thicker metal say 2mm or 3mm
ignore the brightness and go steady across the material
do this a few times and then see what your getting if burn through then move a little quicker if spits and spats slow down until you get one continuous line of weld
First off, if you haven't already got one get an auto-helmet and make sure you adjust it so you can see when you're welding. If you can't see what's happening you're never going to make it work. The welding shields that come with welders are way too dark to see what's going on in my experience. Get some nice shiny metal the same as you plan to weld and use it to get your setup right. Make sure your wire feed is properly adjusted. You want it that it's smoothly feeding but if you pinch the wire at the torch and between your thumb and index finger the drive rollers will slip and the wire will stop feeding. If running gasless, remove the gas shroud from the torch so you can see a little better. Start with low power and a slow wire speed, contact tip about 5mm away from the piece and try running a bead. At a guess travel about 5mm per second. It will probably be popping and spitting all over the place but keep going and turn the wire feed up until the popping stops and you get the sizzling bacon sound. On thin metal you'll probably burn through in about a centimeter once your settings are correct. If you're looking to weld thin stuff (what's in the picture looks thin) then you'll need to use the pulse technique - ie. weld in short bursts about 5mm at a time, wait a second, weld another 5mm, wait a second etc.. If (for some reason) you're getting lousy penetration, up the power and repeat the above process. When using the pulse technique with gasless don't wait too long between pulses as once the weld and flux residue have cooled you can get trouble striking an arc (a quick scrub with your glove should be enough to get going again should this become a problem). Key thing is, you need to find the settings that give you decent penetration and that sizzling sound. Once the settings are right, on thin metal avoid burning through by pulsing the trigger.
One last thing, once your settings are correct, don't be afraid to use both hands when welding. It makes it so much easier to be steady and keep a constant distance from the work piece etc.. I know it might seem obvious but unless someone tells you these things!...