You can check and use MinerGate. I think it is the easiest to start mining BTC with your computer. Of course, not much!
MinerGate is one of the largest multicurrency mining pools, where users join resources to get a share of profits. The project was started in 2014 by a group of blockchain enthusiasts, led by Claude Lecomte. MinerGate operates with 10 coins and supports 4 major mining algorithms.