Make it low risk for a start. And don't be fooled by superannuation's 8%, there's too many takers. Also superannuation needs to be monitored for fluctuations and volatility which may not be fully understood by young adults. As an ordinary worker, I lost ten years of gains in the 2008 crash, I was back to square one. I couldn't draw the money out because I had not yet retired, so I moved it to the Cash portfolio and left it there. Cash is like term deposits, and you don't lose any of it.
I also had bank accounts and bank term deposits which I salary sacrificed into, a small amount each week. This built up and the returns started to overtake my Super returns. In the end Super was insignificant and my Bank account strategy paid off, beating my Super by hundreds of thousands of dollars, even after paying tax on my earnings. After retirement I was in a position to pay cash for a residential property to max $250k, with funds left over. And I didn't start early, I started late in the day.
There was no bank fees, just continuous interest three months at a time, heaps of it, it left my Super in it's dust, regardless of what my Super portfolios were.