Blue Collar worker by day , assests seeking entrepreneur by night

[Nat Seangsumat]

Hi me kenni again , I'm a young entrepreneur always look towards the future. I'm 18 just graduated high school and currently working full time at a pharmacy delivering medications. I work long hours with lower then average pay. Not the best thing I can be doing with my time I know that , but I have to pay my bills. But before I pay my bills I always "pay my self first" putting 40% of my monthly paycheck aside and saving it and saving it. But as a young 18 year old I don't want to be rich but wealthy and to have financial freedom. To have my assests produce a cash flow every month and year to pay for my expenses so that I can enjoy this life. 

The big question I'm trying to ask is what investments and assests can a 18 year old with average pay investment in to start building a foundation for early on and long term wealth?