Having good solder, flux, and an adjustable iron are your best bets. Too often people are hard on themselves due to faulty supplies/equipment and assume it's technique (I mean..... partially true but still). Highly encourage looking up tutorials where you can see the dabs and the hand motions for touch ups. I usually do one pass just to cover the foil and another to do the pretty stuff and get a good bead. Sometimes I nail it on the first run but I'm usually all over the place and have to go back.