John Cena would advise Travis Kelce to think hard about any potential career change. The 46-year-old actor was a wrestling champion before making the transition into Hollywood and explained that NFL star Travis Kelce – who is currently dating pop megastar Taylor Swift – wants to seek pastures new, he needs to consider the fact that any new skills won’t come overnight. He told ‘Entertainment Tonight’: “I would inspire him to reflect on his journey. He didn’t become a Super Bowl champion in a year. I bet he started playing football at a very young age. This is the one misconception that a lot of…