I usually start planning my trip 1 year in advance. I start checking package deals and airline deals. I ofcourse have the date picked out. Than usually my ADR are all made 180 days ahead of scheduale. However this year after we bought the package and airline tickets my mom got sick. She ended up moving in with us and passing away so here it is 25 days away and I am just now finishing the ADR's and the rest of the planning. As you can imagine my heart is not in it but my dh says we need to go and have a good time. My mom has only been gone two months so I am not sure if it will be possible to have a good time. She also made me promise to keep the trip. Anyway I didn't have any trouble getting the reservations we wanted so my angels must have been watching out for me. In the past there have been some reservations I couldn't get even 180 days out. You can make the ADR's and than if you change your mind you can conceal.
Read, study and check the internet all the time. You will have a great time