I was 20 almost 19 years ago. I actually listened to my parents and now I wish I didn't cuz they didn't know what they were doing.
I racked up $17,000 in credit card debt. Most of it was from helping family. I was just 20/21 but I was the only one who had any sort of credit card. They told me you have to get in debt to build good credit. When they got a house I paid for the driveway to get paved, the shed to get built, new water heater, new furniture throughout the house and renovate the basement. I also put up the $3,000 needed for the down payment.
I gave my brother $5,000 when I was around 24. Him and his wife woke me up around 2 am talking about drug dealers was trying to kill them if they didn't come up with the money. I later found out they was lying, and used the money to buy the drugs so they could get high themselves.