Potentially the easiest switch ever?!
Most toilet paper comes wrapped in plastic, however usually there is an easy alternative of recycled toilet paper thats wrapped in paper. It's in most grocery stores so you don't have to go anywhere specific to purchase it.
The first thing Josh said to me was - 'I'm not using recycled toilet paper..' -- it's just recycled paper, so it prevents more trees from being chopped down, a huge win for animals and their environments. It also uses less resources such as water and energy to produce - and of course it's still 'soft and gentle' ;)
So, in conclusion, just buy the paper that's wrapped in paper - not hard!