Start the ROTH NOW.

When you do the 401k, put it all into the S&P 500 index fund that you will have as a option.

Invest in a mutual fund, automatic deposits every month. Pick a fund. Since you are young you can play and learn. Pick something exciting. Such as an all health care fund. Maybe an all Electric car fund. No idea if that exists, but what the heck.

Look at starting a Dividend Reinvestment Plan into a utility. Slow and boring. I always recommend either AWK or WTRG. Every one needs water. You will not make 500% in a water utility in a day, buy you also will not lose 85% in a day. This is what I call a foundation for a young investor. A good building is built on a strong foundation.

If your company gives you stocks options, and they are sold at a discount to you, exercise the options and sell the stock. Yes, you pay capital gains but you make money. No one ever went broke making a profit. Plus, if the company goes in the toilet, you are not holding a bunch of worthless options.