Yes you could...and the "more" would be the broker and transaction fees if any.
Your best bet is some form of mutual fund where you can invest a little at a time on a regular basis. And key here is to keep putting a little at a time in over a long period. Before you know it, the little bit will become a nice portfolio.
You can still lose with a mutual fund, but it's less likely if the market continues to expand over time. Which it has done for decades.
If it drops for a while, like back in 2007, don't panic. Keep your portfolio going and keep putting in a little bit. When the market regains, which it always does, you'll show a big gain in the fund.
I'm retired and currently live off my investments.