Tidy up a conference excel workbook

I have an Excel Worksheet that is out of control. it shouldn't be this hard.

The front sheet is all data for conference attendees (costs for different types of attendance, single or double room, how many nights, flight details. the back sheet should all read from this sheet (hotel data on one sheet, flight arrivals on another, departures on another, meal choices on another...you get the drift?)

Any chance we can work online together and I can ask for what I need as you work? Anything complicated you can take offline and complete, but I don't think it is too complicated, to be honest, just poorly managed.