Can I just echo Jazzy B's words. We too are out the last week of June/1st week of July and this is also our first time booking everything independently! All the advice from the forum members has been so useful so a big thank you to you all.
We are also out at the end of June.Jazzy-B,get a young person to put the phone number into your phone before you go.Then all you have to do is press one button.Worked for me.By the way,we have booked independently for the past 26 years with no problems.