it takes many hours to become proficient in all positions no matter the media
Aha, the Kama Sutra of welding?
I'd buy that book!
As mentioned here, practice on scrap, it will save you from a lot of angst.
Using arc welders, warm the rods in the oven, they strike much easier. I clamp a piece of scrap to the job for striking an arc when I'm worried about the overall finish of the job.
The best tip I was ever given, clean the surfaces to be welded, like painting, the cleaner before starting the better the finish.
I had a friend recently tell me how much trouble he had welding over greasy steel which he was adamant he got it to hold. I told him I could probably crack the weld with minimal force.
This after he watched me do a job and said "it looks great but you spend so much time preparing"
Weld does not burn old paint and galvanised coatings off, they simply contaminate the weld and weaken it, along with the toxic fumes they create.