To add to what Bluebasser said, I would look if possible for any structure, i.e. grass, any type of wood/trees, ect. As bass usually bigger bass will use structure to ambush prey, the biggest bass will find the Best spots.
You didn't say what the depth is, nor what type of rods/reels you have. A couple of things you could try to get a bigger bite. I'd get a 3/8 or 1/2 oz Arky type skirted jig in a natural color, and grab a pack of Reaction Innovations sweet beavers. Cut off about 4 rings of the beaver and thread onto the jig. You can search here or youtube on how to do that.
Then toss it into any cover/structure on your pond, be Patient, work it slowly, by casting out, let it hit bottom, then hop it about a foot off the bottom, make sure to watch your line, and keep on of your fingers on the line to detect any bites. There are other ways to try and catch them, but I would try this first.
I've fished almost every pond in So. Cali, so I know catching fish can be frustrating, hang in there, and try to learn from every outing.