If you decide to convert to muslim for your husband can you change your decision and go back to religion you w?

my fiancee is muslim we having a muslim wedding to get him hereo canada it is legal with canada immigration my question is this if i convert to muslim faith can change backto my religion i was before my freind told me if i decide to convert i need to know if this what iwant to do so i am thinking could be difficult to change back to my religion i know som about muslim faith but not a whole lot so please help me thak you