what should i begin to invest my money in?

i have bought two cars and i have a piece of land and both cars are paid off the land i'm working on it but i have extra money that i want to start to invest in so that i can increase my bank account if thats the correct way to call it ha. anywayz i loved to help people and i do help folks out as much as possible also and i plan on investing my money so i can double it or triple my moneys. That way i can help more people and be set and stable for myself i am 20 years old and i work everyday i take classes at night and internet does anyone have any ideas or suggestions that i can ponder on i'm open for suggestions.