You Can Downgrade If You Don't Like Android 6.0.1
If you decide that you don't like Android 6.o.1, you can downgrade to another version of Android. You might also try installing a ROM.
We've put together a guide that will take you through the downgrade process. (The guide is for 5.0 to 4.4 but the process is similar). It's a little time consuming (and there's also a chance it causes additional problems) but you'll want to take your time, especially if you're new to Android.
If that guide isn't enough for you, here is an additional guide that could come in handy if you want to make the move back to Lollipop or older.