Is a hand drill suitable for drilling internal walls? (plasterboard)?
yes with the hand drill you can go slow in case there is pipes or wires behind the wall.
A hand drill should work fine for wallboard internally but as another poster indicated, you should be aware of wiring or plumbing behind the wall. You can also use a sharp or semi-sharp object to punch holes in hollow walls to add screw anchors to hang pictures and shelves, etc. I've used awls, nailsets and even a philips screw driver to do this.
