Whatever you do, DON't mention to any consular official or border official that
- you are a physician
- you are unemployed
- you intend to practice medicine in the US at some point in your life
(this makes you an 'ineligible alien physician' and excludes you from entering the US until you have passed your USMLE exam)
Whenever you apply for a visitors or other nonimmigrant visa to the US you have to proove that you have ties to the country you currently reside in
- family that stays behind
- a job (bring pay-stubs or tax records)
- an unabandoned residence (rent or mortgage receipts)
- you have the financial means to pay for the trip without having to resort to work
Otherwise they might think that you are trying to stay in the US to work illegally.
If you indeed want to work in the US, this is what you have to do:
- pass USMLE 1,2ck,2cs
- find a residency position
- obtain a work (h1b) or exchange visitor (J1) visa