Can you please advise whether or not a non tech like me will be able to intergrate one into CB, or not?
If no development experience is present then is very unlikely on first attempt. You certainly could do it with time and practice of course by using existing plugins as examples.
If so, are you able to offer an opinion on which one to go for, please?
Haven't used any such advertisement extensions, but the developers of those extensions should inform you or can inform you whether it works well with CB or not. I suppose it really depends on what sort of integration you're after.