Loinky,
1. The 1st thing to do is to choose your wedding gown first.
2. Photoshoot - judging from your AD, you should have it end of this month. Select your photos and settle the layout within the next 2 weeks after your PS.
3. Call up JP and book him or her for your solemnization. Then do ROM registration online. Must be done within March.
4. Invitation Cards - Is the restaurant providing any? If yes, just find a printer to print your inserts. Can be done within a week. If no, then you got to find a card company to design eveything. For my case, I went to JB to get my wedding invites. Paid abt RM400 for 100 pcs (cards, inserts and envelopes). The only con is that they have limited designs. Period required : 2 weeks.
4. Have you gathered your helpers?
5. GDL is usually 2 weeks before AD. You can have March to prepare as our Hainanese GDL is very simple.