H1B approved -suggestion for OPT extention

[one_student]

Hi

Thanks for reading my post and replying.

I am working for one company. They sponsored my H1B visa. It is approved. I am still on OPT. My H1b will be effective from October 1st.

I am really having tough time with my supervisor. I decided to quit this job. Recently I came to know that, I got permission for 17 month stem extension. I want to apply for that.

If I resign my current job and apply for OPT extension, will it be a problem in the future for applying HIB visa and current status?

My student visa will be expiring by November 30th. And OPT will be expiring by August 31st.

Is it a problem, if I want to quit this job, and look for other one on OPT. Can I stay here after expiration of F-1, even If I get my OPT extension?

I appreciate your suggestions and time

Thanks

student one