Many already gave you good advice, but as someone who was once in your shoes, I will leave my 2 cents here.
1 – Forget about immigrating right now as this is a very long process. I know how it feels, but if you want to do things right, work on reasons to be appealing to foreign employers before thinking about visas.
2 – Work on your Kung Fu. Meaning, go chase your degree no matter what. It is feasible (or at least was) to work and study in Brazil simultaneously. Also study on your own and start working on your reel right now. In this field, many employers ask for your reel before they look at your resume. And yes, I know you said you are unemployed, but even if it’s not on your field, don’t scoff at opportunities that have nothing to do with what you want to do as long as it helps you pay for the degree you want.
3 – Don’t focus so specifically in the US. Many Brazilians are entitled to EU passports and either don’t know about it or do not consider Europe as a viable option. Not only there are many big name studios either based or with offices in Europe, but you may find that the US is very different from what Hollywood shows.
In sum, take a deep breath and relax. Immigrating is a long-term project and the quicker you accept it might take a long time, the quicker you will start building a solid foundation to do it right.