ok ill give you my advice, im young yes but still if you want to heed my advice its up to you.........
its quite dependant on how much you want to spend...........
first you need to decide where you want it to take place, im guessing it will be a church or a hall ?
then ofcourse you need to meet with the priest/the owners of the hall etc to set a time and date suitable for all parties......
then you need to decide on what arrangements you want to make for guests depending on seating/capacity, if its a church that pretty much straight forward, but if its a hall you need to get togethor and plan the room out, where you want chairs tables etc
then you need to decide who will be bridesmaid best man etc and devise a list of asking people, then look towards the colour scheme you want then to wear
then you can plan for the decorations, depending on how flash you want to go, example ballons, flowers, ribbons, petals sprayed everywhere etc
catering needs to be devised obviously, if you plan on after wedding party for sandwiches, snacks, drinks, up to you, not forgetting the wedding cake
hire your cars, limo or something, or you can use your personal transport (if you have some)
all this is money dependant, if you want a visit to the registry office... a couple of witnesses and then your done, officially married.