It is possible for anyone, at any age, to start an acting career, and I would give the same advice to some over 40 as I would to a 20-year-old: Think like a business person, not an artist. Create like an artist, sure, but run your acting career like someone running a business.
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.