The main way people get strikes is by not being detected as torquing the steering wheel enough, for too long.
Most of the time, you get at least 15 seconds of "free ride" with no warning that the "not enough torque" clock is ticking. On recent releases, the first warning is a popup fairly low on the left portion of the screen. This one is pretty easy to miss noticing unless your peripheral vision gets sensitized to it.
A few seconds later, the next warning is a light blue shading background pulsing slowly in the upper portion of the left screen. This is much harder to miss.
The next warning combines sound with a more prominent popup. By the time this shows up you have not much time left to apply a little torque to the wheel.
Enough torque to be detected as paying attention, while not so much as to exceed the breakout force and pop you out of Autosteer is something to be learned. Personally, I find it easiest in cruise to hold my left hand at about the 10 o'clock position and just let a little weight fall on it. I can sustain that for many freeway miles without failing in either direction. Going around turns, I find it easiest to just let the wheel slip through my fingers very gently touching it.
Some folks have very little trouble with this, others quite a lot. Good luck.
I've not yet had a single strike, and I've got thousands of miles of FSDb driving on two cars over the course of a year in two different vehicles. Others report undeserved strikes popping up with high frequency.