No worries
Really
Frankly.
These are big planes. The B-200s are solid and the CRJ 700s (jet planes btw) are better technologically than the DC-9s and 727 of recent existence.
I would not worry a bit flying in any of those (heck I have flown in both of those type of planes this year)
The prop planes are just a bit slower, that's about it. Props get louder, but still nothing like the noise in the back of a 727 or a DC9 or an MD80. And these are bigger than some of the ERJ jets. And they have a lot of safety systems. No worries really. Just see it as a novelty and relax and enjoy.