I know how to cut my own hair, so I'm keeping it cleaned up and shaped like normal. I trimmed and reshaped mine a couple of days ago actually as some of my layers started to look a little shaggy and my bangs were looking blocky as they grew out and needed turning into layers

Basically, if you're not confident in your own ability to cut or buzz - don't do it. If you're not okay with potentially having to shave it all if you mess up - don't do it. If you can go slow, if you have a simple cut and aren't trying to get fancy, and/or if you have good tools (NOT kitchen scissors and mirror(s) large enough to see angles well), you may as well try it if you really cannot wait.