Depending on how much you have on your plate you might want to think about hiring a project manager before selecting a tool. Compare the time it will take you to master a tool and customize it's uses to fit your needs vs. hiring someone who has knowledge of project management and the tools needed to implement trusted practices. Once you find this person they will know which tools benefit them the most and you will most likely get more productivity by allowing them to utilize those tools. If you are set on doing it yourself, find out what aspects you need to manage before starting to learn how to use a tool. You might find that a tool one company uses does not fit the need of your own.