[PCBatman]

You just need to start with what you really want to do and you’ve hinted that’s Harry Potter! So start there, download the universal and Disney apps as they tell you about rides etc...and start browsing the forum. It’s hard to give you an exact itinerary because all 5 of you may want to do something different. Universal you should be good to get most things done in 2 days...may want to consider their version of fast passes if you can afford.

If you are staying on-site Disney then you’ll get 60 days to do book your fast passes if not then it will be 30 days. I recommend booking the big rides, such as flight of passage and slinky dog.

You’ve got plenty of time, start by doing some research on the different parks as with 3 days Disney you would be hard pushed to see everything. Once you know he parks and/or rides then come back and chuck up a rough itinerary and people can help you from there