Keep walking north on Disneyland Dr. until you get to the PPH. You can either enter the PPH hotel and walk through to the back exit, then follow the path around to the parking lot behind the hotel, and keep following that path (and the posted signs) around the DLH to the DLH/DTD bag check. Or you can keep walking on Disneyland Dr. past the PPH to the driveway entrance of the parking lot (it will be on your left), enter there and head for the DLH, follow the path and the posted signs to the DLH/DTD bag check, and ta da! This is an easy walk -- once you've done it, you'll be able to do it again quite easily.
If you place a mobile order at the Starbucks Downtown Disney West II (the small one by the
Lego Store), your order will be ready by the time you get through the DLH/DTD bag check.