And to make it easier to understand, the tourist visa is only good for maxmium of six months, even if you were to find an employer, the issue is that there are no visas available, and you can only adjust a visa if it is current and in status.
It is going to be at least two years as things are going now, and since the US has been under the retrogression since October 31 of last year, wanting to take cuts in front of the others is not a good thing. The only route that you have available to you is the Consular Processing, or better known here as CP. And to add to this, passing of the NCLEX-RN exam no longer guarantees that you will get a visa to live and work in the US. There are too many applicants from your country that are already waiting, and the US does have a limit on the number of green cards issued to those born in your country to under 10,000 per year.
You may wish to reconsider another country to get your experience in.
Right now, there are over 632,000 students in nursing programs in your country, and many with the same wishes and desires as you.
Best of luck on whatever you decide to do, but please do not even consider the tourist visa route, just is not going to work for you or anyone else. And remember that you got the tourist visa because of your parents, not because you just applied for it.