How can I start investing?

Hello everyone I have a capital of 20,000, and ,I really want to learn investing. I feel Reddit is a platform where people are open-minded and have good knowledge, so I would love to have advice from you. I'm a college student, and my father has a lot of experience in terms of the stock market and investing. He has been investing for the last 19-20 years, but he doesn't like to share knowledge. I have asked him like a thousand times, but he says you can't do it.