On the lower torque wrenches in particular just be wary about the accuracy of the wrench and take good care of it. Always back it off after use when storing especially, and still it’s best to have a rough idea of when it should click and if you think it should have gone by now, then stop! (else be prepared to be drilling snapped bolts out).
Technically you should be calibrating the wrench often, but that means paying someone to do it really.
Also watch out if you apply thread lock or any grease on threads as this changes the torque. Don’t use it to undo anything, and in my experience using it on reverse threads is no go despite it having a reverse setting. Just never clicks.
My small wrench goes down to 5Nm but states it’s less accurate at the ends of the scale, and after a bolt snap incident (to correct spec, didn’t click when I expected), anything around 5 to 10Nm is really just hand tight so I’m more confident to just hand tighten to what I feel is right. My big wrench is often used for the heavy stuff up at 40Nm as by hand I’m frequently way under the mark by hand. Still I do it in bits, torque to something lower, then set bit higher and so on. If I feel I’m putting in way too much and it’s not clicked yet then time to stop.