I recently finished a project that has accepted for publication in a preventive medicine journal.

I was hoping to submit the abstract to some conferences to improve my presentation skills, and my supervisor informed me that I should make sure my paper is not published before the abstract is presented.

The journal has given us a 12-week ETA on publication, and both conferences I was hoping to present at are much later than that (16-24 weeks). As a result, I was wondering what my possible options are? So far, I have four questions:

1. If my paper is accepted for an oral presentation instead of a poster presentation, could I still present them if the paper has been published?
2. Could I ask the journal to put a hold on production so I can present at these conferences?
3. Does it matter if one of the planned conferences is not international / if they do not publish abstracts?
4. Should I contact the managing editor to ask if I may present the abstract at the planned conferences?