You can’t know if you’ve got a talent for guitar if you never try to play guitar.
And it’s the same for knitting, badminton, and singing. Find a talent that seems cool and learn everything you can about it. Find out what it takes and see what you’ve got. If you never try, you’ll never know. You’re not going to find a talent without trying. You can only find your natural abilities, skills, and talents when you test your mettle and actively seek new experiences. Face down obstacles and seek out challenges to see what innate skills and abilities you might be hiding.
Make it your goal to try something new every week. You might not discover something that you’re super-talented at, but maybe you pick up a guitar one day and find out it feels comfortable in your hands and decide to learn more. Maybe you discover an ability to connect with animals at the shelter, something you’d never experienced before. Maybe you learn you’re an ace at the Bishi Bashi gaming machine at the arcade. That’s the start of talent.
Get outside and scrape your knees. Go on adventures and experience the world in its natural habitat. Try out different sports, outdoor hobbies like fishing, hiking, and climbing to see if you’ve got an untapped natural ability or an instinct for it.