It’s never too late to start. Someone 40+ starts the same way a 20-year-old starts: by taking action. You set goals, commit to them, take class, take workshops, build relationships with other actors, etc. Many actors don’t hit their stride until later in life anyway.
Can I wear jeans to an audition?
You don’t need to dress like you’re going in for a corporate interview here. Your clothes shouldn’t be a wrinkled mess, but you also shouldn’t be wearing business attire to an audition. A good pair of jeans can go a long way, and it’s worth investing in a pair for auditions alone.