I just got back yesterday from my first ever trip to
Disneyland and stayed at DLH. Yes they have self-park and valet park. We did self-park (not far). The resort does charge your $35 per night for parking. Yes, you can go right to the hotel and drop all your luggage off with Bell Services. They will hold it for you until your room is ready. We go there at 9AM, dropped off our bags, checked in at the desk (I had a military discount so was required to show ID). We were given our room keys at that time, though the room was not ready. If you are doing Club level, you do have access to the E-ticket lounge right away though. So we went there and had some breakfast, then off to the parks.
It sounds like you made park reservations already so your tickets should be loaded already onto your Disneyland app (if you bought through Disney). Get familiar with that app right now and check all that stuff out before you go.
You can start using
Genie+ to reserve rides right after you scan into the park with your phone/ticket.
My #1-- Parks were very crowded (VERY) after about 10AM. Make use of rope drop which, for us, was 8AM, so we were through the gates around 7:30. We did a LOT of rides in those 2 hours and could have done Rise of the Resistance in the first hour for free if we wanted to do the 45 minute wait. That was the shortest it was all day.
Plan out your meals as well as you can. We got caught short on our first day because we just couldn't get our bearings. Ended up eating a hot dog and really no "dinner" like my daughter wanted. The dining options seems limited compared to WDW but there's certainly plenty there.