Try and see if you can get which restaurants you want at the time you want. Then keep checking back for the others. Especially around 45 days before you go people will start canceling reservations because they decided to change or not go on their trip. Their ADRs will open up.
I just booked for February 2 weeks ago, and I had no trouble getting everything we wanted, including Jiko, Victoria & Alberts, Citricos, Rose & Crown, and Tutto Italia.
We just decided a week and a half ago that we're going for Christmas - I got all my ADRS with the exception of one, and actually I have two ADRs for that place at the same time - one for 4 people and one for 1 person to equal our party of 5. Everyone at WDW Dining says I shouldn't have any problem combining and getting a table having done that. This is for Christmas week and there is free dining - it isn't too late for April!