As someone who fought 10 years to get it, it's not easy. Best way is to find a situation where you can be promoted internally, at least to a team lead. Make it clear to your boss that's what you want to do, and hopefully he or she will listen and you'll get lucky. Alternatively work in your current position to get some experience that could lead to a team lead position (project management, coaching, 1 on 1's leading discussions, etc), and start applying for them.