What to expect in pleading guilty is really up to the DA handling your case. It is very rare that you would enter a plea of guilty at the first arraignment, and from the facts as you present them you probably should not plead guilty.
You really need to hire an attorney. There is no need to go into court for a matter this serious, and make no mistake this is a serious felony, for which you could face significant jail time, without someone there to fight for your rights.
I would be happy to talk to you about your case. Consultations are free at my firm.