Remember, you can teach anything; there are no boundaries.
I went into a school a couple of months ago and was presented with young children who had never played any form or cricket before. They were all right hand dominant but I taught them to bowl left handed. Very quickly, they became very good at it and their technique was really good.
However, when I asked them to bowl with their other [right] arm, they all found this 'strange'. They mastered it eventually and now bowl left and right handed on command. They are great at catching with their left hand but have not quite masted the left arm through yet.
Try this with your new players; they may surprise you.
I am so pleased everybody gained so much from the experience