What financial situations should I make as a 20 year old

I'm a 20 year old guy working as a plumber making 17 an hour. Plumbing will hopefully be my career and I hope to have my own business withing 6-10 years. As of right now I dont have any expenses besides gas, but if I chose to move out my expenses would be something like 500 a month. Dont ask why it would be so cheap but it would. I just got my first secured deposit credit card so I can begin building credit. What decisions should I make here? Investments, savings, and the rest? Trying to set myself up. And how can I resist impulse buying?