Remember you are using muscles like you've never used them before when you amp up. There are lots of reasons to stay within your range at the beginning. I didn't have this advice sink in when I started. I did screw up and do one thing right though; I did an internet search on two terms: "disc golf," and "tips for beginners." http://www.alltheweb.com/search?q=%22disc+golf%22+%22tips+for+beginners%22
There's a mother-load of info out there.
I mow a disc golf course. Because I sucked so bad, I actually mowed an area out of sight of the course, and I mowed it far wider than any of our fairways. I spent hours there, throwing upslope and down. I was always going for distance. My drives were as likely to go 45 degrees to the right or left as up the center. I could still toss discs into the woods out of pure wildness. I didn't let that back me off. Though after two years I was just getting up to about 250 feet, it was equally as long a time before they ever started to come under any kind of control. The funny thing was, I was pretty good at the 175 foot approaches. Too bad my drives covered 400 feet to go 200 and get in position for that good upshot.
I'll lay money you'll get onto it sooner than I did. Whether that's the case or not, sounds like you're already addicted. The good thing is, we all can quit any time we want to.