Enter on Visa Waiver, then convert to J-1 [duplicate]

I would like to enter the USA on the Visa Waiver programme, and after a week of stay change over to a J-1 visa (i.e., have a week of holidays before I begin my academic exchange).

Is this possible without leaving and re-entering the U.S.?

Edit: it seems in other threads that some people have left and re-entered, that there seems to be a 30-grace period for early entry of J-1 holders, and that conversion from one visa to another is a lengthy process. Has anyone made any experience with these options?

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Can you change status to J-1?

To change your status to J-1 student status while remaining in the U.S., you must submit an application to U.S. Citizenship and Immigration Services (USCIS). This process may take 3-6 months or longer, so plan accordingly. ISPO recommends that you start this process at least 6 months before your current status expires.

Can you get J-1 twice?

Can I apply for a J-1 visa twice? Yes. The J-1 visa for interns and trainees can be applied for multiple times.

Can I change my visa waiver status?

Use of the VWP for entry to the U.S., however, comes with some strict conditions. You are, at this point, very limited in your immigration options. In particular, you are not allowed to change status within the United States.

Can I change my F-1 visa to J-1?

If you are a graduate on F1 OPT visa looking to become a J1 intern: You must leave the U.S. and pursue a post-secondary education degree. Then, you can apply for a J1 Intern Visa within 12 months of finishing your studies at that institution.

How to apply for the J1 Waiver? Step by Step Guide.

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