Ok, so it is a 4 Core CPU, you can try with 4 mining threads in the config to see if the hashrate you get will be more stable and not fluctuate like at the moment. With a hashrate of about 26 KHS you are probably going to be getting 1-2 blocks per day.

Note the estimated time to produce a block that is being returned to you, this can give you an idea on how much it will take to mine a block and have you included in the witness-miner queue to witness a block creation and get a reward. The time in queue is about 1-2 hours and then you are back to mining again until you mine another block.