Need Any Welding advice?

#1, practice. If you are able to have any scrap metal left over during your project, play around with welding scrap B4 you hose up your work. I would need to know what you're welding tho. Example, you do not want to weld a custom aluminium gas tank with a spoolgun, or with the wrong weld filler. The results could be disastrous lol.