Step 1: Starting
When you first start, click (or press) until you find an open gap. Also, it is okay if you hit a mine when you first start.
Step 2: Where the Fun Starts
If a number 1 is next a open gray spot, it is touching a mine. It always a mine if a one a touching a block. The same rules apply for higher numbers (such as 2 stands for 2 mines, etc.). That is all I have to see and happy Gaming.