Congrats on your upcoming engagement!
The process takes 9+ months, it depends somewhat which service center and which embassy you go through. Our Guide will tell you what documents are needed and how you can prepare: http://www.visajourney.com/content/k1guide You will need to Adjust Status after marrying and yes, you can stay and study- in fact, you will not be able to leave the USA for a few months.
As to your family coming to the wedding, they would need to apply for tourist visas, and show strong ties to home/ reasons they will go back after the wedding such as owning property, good jobs, enrollment in university etc. What some people do if they cannot afford the plane tickets for family or they don;t get visas is to have a delayed honeymoon back home a few months after the wedding in the USA, and have a religious blessing and reception at home.
relating to my previous posts about cancelling my petition for i think my fiance and i dont have enough evidence to prove extreme hardship, i no longer plan to withdraw my application. the reason being is that we're going to submit a waiver. we'll include there that my fiance is the sole provider for his son. when he got the job in the US he took all the financial responsibilities to his son meantime we had plans on marrying but he couldnt leave the US cause his son is depended on him. instead of using the money to buy plane tickets he used it to pay for his son's tuition, everyday needs and whatnot. so do u think that would be a strong argument or a weak one? thanks
