As martingray360 said, 15K is not a lot of views where YouTube is concerned; and as they are spread across multiple videos, of course the earnings will be small. Also you don't get revenue from people simply watching your videos.
If you have pre-roll ads, viewers must at least watch all of the ad for you to earn from it. Overlay ads must be engaged with by viewers going to the offer the ad is displaying by clicking it. Earnings on new uploads take at least a week or so to display properly.
If you came to YouTube only to "make money", you've come for the wrong reason; YouTube isn't going to make you rich unless you get millions of viewers watching your videos and subscribing to your channel. I've been on YouTube since before the monetization plan was in place, and I started making videos because I wanted to help people with hypnotherapy and sound healing, not because I thought YouTube would make me lots of money.
I've set my Adsense threshold at many times the minimum payout and forgotten it. I will be pleasantly surprised if and when I do get paid.
That said, keep on posting quality content people will watch all the way through, and the subscribers and money will come.