It is popular to use easy blend yeast, this is mixed directly into the flour.
However, it can be unreliable and a better result is achieved by using a traditional dried active yeast.
Directions are on the packets and it is important to follow these.
The most important point is not to kill the yeast with water that is too hot. The best temperature is blood heat, dip your finger in the water to be used, if you cannot feel any temperature difference then all is well.
If the water is too cool then the yeast will take longer to activate.