The appendix are located on the right side of the body.
Almost always on the right. (Almost always because in rare instances it is on the left.)
The stomach is on the left side of the body.
The heart tends to be over on the left.
If you want to be ambidexterous its all about- incresing nervous enervation of your muscles on your weak side and teaching your brain to control it (eg. the number of nerves to that side),- incresing...