“I don’t want to watch my account value regularly change.” Then ignore it. The long-term trend is upward. If you rebalance your account once a year or a quarter, you’ll see your accounts go up, not up, down, up, and up.
“I might lose money.” When you keep your money in a savings account, you are guaranteed to lose your money to inflation.
“No, I might lose all my money.” If you diversify, this is very unlikely to happen. Have a global portfolio spanning the asset classes and you’ll have hedged yourself against one sector under-performing. Furthermore, you could begin by weighting stability a little more and growth a little less than traditional.
“What if I pick the wrong investments?” So long as you are picking investments that are publicly priced and traded, you can’t make too much of a mistake. Furthermore, David John Marotta has already provided a recommended portfolio for new investors he calls his “Gone Fishing Portfolio.”
To read more about this topic check out Essential Financial Advice for College Graduates