I am ready to challenge myself in the USA as an aerobic instructor. I speak English and German. I have 11 Gymsticks (fitness tool from Finnland – very good), and I would like to hold classes with those, but I have certification for many other class types as well (Body Balance, Kangoo Jumps, Cardio KickBox, Total Body Cardio..)
I saw your comment to Harris. I speak from the perspective of somebody who has gone through the immigration process.
I understand your desire to stay in the United States. Be aware, though, that violating US customs and immigration laws as you are trying to find a sponsor can get you into really hot water and will not help your case if and when you find one. I am sure you know that the only other way to obtain legal status is through marriage.
You can speak with an attorney who specializes in immigration questions to see whether there are other options. But PLEASE stay on the straight and narrow in all things related to work in the US. If you only have a tourist visa, you are not allowed to work.
I wish you all the best.