Muratza, I'd suggest if you can, just get any visa and go and explore, make connections and soon, opportunity will present itself. Especially, if you have any good technical base knowledge, there're tons of opportunities.
Also I'd explore if there's a possibility to get help or support from US MAC (US Market Access) as they like to support young entrepreneurs relocating to US.
You may need to run with different visa for a while but it's all about getting there and starting. It still works the best.
Good luck on the journey!