After MBBS

There are lot options after MBBS depending upon your interests and there are no limitations if you want to do something, your gates are not closed you can pursue anything you want. 

The ASPIRE-SPECTRUM community have prepared a comprehensive folder of amazing possibilities which lied ahead after MBBS, here is the google drive link: link_drive 

For USMLE:

if you are wondering that you require a good financial status and lot of contacts to appear for USMLE, it is not, the only thing matters is determination. Read this post by Dr Ashish Kumar