Hello Me Bride, welcome to our forum! I apologise for taking so long in responding, we have had a few technical hitches which are now all sorted!

Congratulations on your engagement!
Two years is a good amount of time to get organised, the timelines all depend on the person and what you are wanting...some people take longer and some take less, it is a personal thing but it can also become about availability of `who` and `what` you want as well - such as venues, celebrants, entertainers....all of your wedding suppliers really! You might want certain venue or celebrant and if you don't book in early, what you want may be booked - throwing all your choices into chaos!
Organising a wedding is a massive job and we would recommend booking everything as early as possible to ensure your day is everything you expect it to be!
An expert can always help too. All of the people you call on for your wedding day have done this before and are usually more than hapy to assist with advice - so don't hesitate to ask.