The best way I've made friends out of strangers while playing disc golf is playing local doubles. You'll become friends with those in your group and you'll likely learn from the better players you get partnered with. (Even in a town where there were established cliques that were hard to break into, partnering with someone almost always was a good experience.)
Also, if you are really interested in learning the game, find out who the best player in your town is and invite them to play a round with you. Tell them you are learning the game and heard they were the best around (which will make them feel great). You can ask for pointers along the way, and observe them on a course you likely play often. Offer to buy them a drink/meal or whatever for their help.
Sidenote: during tournaments many players aren't at thier friendliest, because golf is a game that requires focus and often an internal battle. I've found people to be cooler during casual play.