So, you chose to gain control of your time and started using a time tracking tool, possibly one that allows you to record billable hours. Good for you!
However, this is only the first step towards your goal. Like with all strategies, collecting that data won't be of any help unless you analyze it.
Allow reasonable time to pass so as to collect a minimum amount of data to work on. Conducting this analysis only a week after you've started using your time tracking tool won't be of much use, because it's unlikely (although not impossible) you will work with several different clients in a week.
As you're going through all of this to become more efficient in the first place, it would be a pity to waste time and effort on an evaluation you could carry out, say, at the end of each month or quarter or semester instead.