Can I use tap on la Metro?

Excuse me, I have a question about the transportation system in Los Angeles. I've heard about the LA Metro and I'm wondering if it's possible to use tap on the buses and trains? I'm not familiar with the payment options and I'm wondering if there's a convenient way to pay for my ride without having to carry cash or exact change. Could you please clarify if tap is accepted on the LA Metro and if there are any specific requirements or steps I need to follow to set it up? Thank you for your help!