Not to be a pessimist, but the ADA sample test is ridiculously easy compared to the real thing ---ESPECIALLY--- the PAT section. The PAT in the packet vs. the actual test is like following the dotted lines on a kindergarten cutout vs. following complicated engineering blueprints. Honestly, there is no comparison.
Don't be lulled into a false sense of security by that packet. It is merely meant as an example of the types of things that you will see. The real thing will be much, much more difficult. You need Kaplan and TopScore. Their sample tests are much more realistic. (Except for the PAT, still much tougher on the real thing 🙁 )
You're gonna do great, though! 🙂