We have stayed at WH several times and it is very easy to get to the parks. Just turn left out of the gate on Old Lake Wilson Road. When you get to 192, turn right. You can't miss the park signs from there! It should take 5-10 minutes to AK and DHS and 10-15 to Epcot and MK. When you are leaving the parks, just follow the signs to 192 West.
There is a shortcut to AK down Sherbeth Road, but if you are not good with directions, I wouldn't bother - it probably saves 3-4 minutes.
As far as Universal, we only went once from WH - it took about 20 minutes. I think you take I-4 and watch for the Universal signs. It was not difficult.