Brian: My advice is to simply stick with it. You've played less than ten times total in your entire life, so of course disc golf is going to be difficult for you. Playing a technical course like golden gate park is a major challenge for a novice as well. To improve, don't worry about your score so much but work on your technique and accuracy. The best way to do that is to go into Marx meadow, or some other open field, and begin throwing your drivers and midranges so that you can figure out what each disc does. Some are meant to turn to the right, others are meant to go to the left. Just like in golf, there are specific clubs designed to get you out of the sand trap and tee off from 400+ yeards.
Challenging yourself on the golden gate park disc golf course is a good idea, because you'll never get better unless you do so. But a better idea might be to hit up one of the easier courses around, like san leandro, to hone your game on a real course.
If you buy a basket and stick it in your backyard, along with a bunch of putters, and practice practice practice, you'll see the results.
Buying a video or book can only help.
Best of luck!