The intern program is usually the first year of residency in general. I am pretty certain that you can do this alone, but it can also refer to the first year of the entire categorical residency.
As an IMG, I don’t think you are able to apply for a lisence to practice until you have 2 years of training under your belt. But htis may only be the case in West Virginia. I think there are web sites for liscening information. So, you wouldn’t be able to practice unless you have a lisence, so I don’t think you can do that much as an IMG after only having your internship accomplished.
Ellie