Ok, you should first get online and look at a map of the area and in scale, such as Google Maps.
The Disneyland resort is a lot different than WDW. The two theme parks are right next to each other and share the Main Entrance Plaza, and easy to park-hop. All three of the Disney owned Hotels are within walking distance.
Paradise Pier is the farthest away, but only a 3/4 of a mile walk. But many non-Disney Hotels and Inns/Motels are just as close or closer. One of the Inns, the Park Vue is the closest lodging to the Main Entrance, closer than the Grand Californian. (Using the walk from the Lobby).
The Disneyland Hotel is nice and seems to be the most "Disney" in feel. The Paradise Pier is an older Hotel Disney bought from another company. It has some serious elevator wait issues at peak times.
But I would look at some non-Disney options, especially the ones that have been recently built, such as the Courtyard by Marriott and the Holiday Inn Express are close, and just a bit farther away than the PPH, you have a set of 3 Hotels at the corner of Harbor and Katella that are brand new. Hyatt House, Springhill Suites and Residence Inn by Marriott. When looking at these properties, make sure you are looking at the specific address, as there are multiple Hotels of the same brand within blocks of each other.
All the non-Disney Hotels I mentioned are highly rated, most come with a free breakfast, and cheaper than the PPH.
Disney also doesn't offer many perks for staying on property, which is early entry each day of your stay, one hour before official opening at either Disneyland or California Adventure depending on which day of the week it is. Many multi-day DLR tickets come with one Magic Morning, which is early entry to Disneyland on the same days the Hotel Guests get it. So many folks use that one early entry, and stay off-site to save money.
If I was in your shoes, if close is important, and you are Happy with a clean room and a pool, opt for the non-Disney Hotels near the main crosswalk, such as the Park Vue Inn or the Best Western Plus Park Place Inn and Mini-Suites.
If you want something nicer, and don't mind the walk, one of the new Hotels I mentioned earlier.