20 years old , inexperienced, seeking first investment

[Daniel Kries]

Hey guys I'm currently serving in the military with 40k to my name. I plan on deploying that in the next couple of months but am unsure where I should invest and what I should purchase. I'm extremely ambitious and looking to fill my time outside of the military with real estate. I'd love to hear what advice other investors would give looking back to the age of 20 knowing what they know now.  Any advice would be GREATLY appreciated, thank you.