at first ob gyn appointment would they tell me my due date

yes.

Yes, based off your last period, until they do an ultrasound because it might change.

at this point im looking forward to knowing my exact due date and ultrasound

You will get an estimated due date based off your last period and then after the ultrasound get your final due date. Mine changed from January 8th to February 21st after my ultrasound

since my first appointment was at 7 weeks and a few days they did an ultrasound that day and told me mine

they try to give you a due date but sometimes they are wrong