I'm not necessarily looking to practice it a ton, but I haven't even done it once to benchmark my selfYou can easily just do a FASTest with an 8" paper plate and a 3×5 index card. That being said, I don't see much utility in practicing the FASTest.
I have the same issue. Maybe it's the dot that leads me to overconfirm, haha.USPSA also taught me how lazy I can be on a sight picture.
Of the components of the FAST, I have a pretty decent time to first shot and decent "Immediate Incapacitation" (2 headshots) but an atrocious "shoot very fast into a medium-sized target." E.g. I've met Gabe White's Dark Pin time for II and White Pin time for Mozambique, but my best Bill Drill is over 3.6s. I think my grip is also an issue, and I'm mostly working on that right now.
Practicing the individual components separately makes sense, thanks. I read somewhere to just practice for the Bill drill by doing 1 shot, then 2, then 3, .. until you reach the 6.