Go Get 'em DartFreak75
I think you are making good progress, learning as you go . . that is what this car stuff is all about. Indirectly you are learning a new skill of welding that will pay dividends for many many years to come on other projects that you dream up and make. Great for repair work too, do it yourself and you are not waiting on someone else and the money stays in your pocket.
I have to kind of chuckle of all the different opinions and suggestions 2, 3, 4 passes . . . more is better . . don't think so.
It is an 1/8" tube you are welding together, get a good close fit. One pass and you are done. Welding has 60,000 lbs tensile strength per inch on a clean pure weld.
Take in the information, follow your own head and you will get it done.
Good For You: DartFreak75 . . .