If you can stick weld mig should be a breeze. Just a matter of heat and wire speed. In general set your heat and set your wire speed till it sounds like frying bacon on a hot skillet. That will be close and fine tune from there. Don’t try to use flux core on light gauge metal. Flux core needs a enough heat so the flux floats to the top of the weld and that is too hot for much under 1/8”.
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