Dtw-ngo-mnl

I am listed for the flight from DTW to MNL with a stop in NGO on the 19th of this month.

Just looking at the regular Delta site it looks like I might be better to leave on the 18th instead. a few questions please.

1. Can I change my date myself without bothering my friend since it is the same route? Live near AP so should I do this now so I can check in online?

2. Could someone please check the non rev wait list for both days for me PLEASE. I am P Holt on the 19th.

3. The aircraft is 744, will weight restrictions be better thru Dtw-NGO-MNL-NGO-Dtw then if I had tried ATL-NRT-MNL My return is 30 Dec.

Thanks so much.