When I started T, one of the first things I noticed was that I needed less sleep. I used to need a minimum of eight hours, and preferably nine -- suddenly I was doing fine with six or seven.
You might try changing your expectations about how much sleep you "should" be getting -- I think sometimes we get anxious about not being able to sleep, which creates a vicious cycle: the more anxious we are, the harder it is to fall asleep, so we get more tired, and so more anxious, etc. Try going to bed later and/or getting up earlier for a bit -- give your body some room to tell you what it actually needs.
Also, if you drink alcohol at all, you might want to stop for a bit -- that can also mess up a person's sleep cycle, especially if it's already disturbed.