Where do i start arranging ..
Don't know
Work out your budget first and then find your venue. Check with the registrar that they are available that day and then book both the venue & registrar together so you have the two hugely important things done. After that it's up to you but I would advise booking a photographer early as the good ones are booked well in advance. Hope that gives you a starting point?
A date .. That fits with being able to save a reasonable budget x
Date, budget and venue is a good start