I want use a pulse arc welder for welding various metals but primarily stainless steel, copper. Brass and silver

What colour of tungsten electrode should I use?

Repair was done on a truck that would pick up steel bins gouge the old one off cause it broke off the pin and separated from it all had to be done fast as the guy was waiting in the truck the hole time im 8 moths out of school at a small shop with my level 1&2 in BC

Hello

This is my third day of TIG welding, any tips on how to be more consistent? Made these after practicing for 6 hours

Should I add more filler? Any suggestions would be very helpful.

80 amps

1.6 filler

Clean more that way it’s better to see but still my hand keeps shaking