you can use your cpu to mine cryptonite coins like monero, electroneum and many more
you can benchmark your gpu
input the values in whattomine.com and mine the most profitable coin
Well with your small rig kryptonite coins should be the only option as per experience since I do have only two GPU rig and using NH I got some dollars a day and I'm enjoying it and saving my btc. Just use this and learned it by yourself.