Finance major here.
S&P 500 average P/E ratio = 15.74
S&P 500 P/E ratio today = 21.74
Overall, things are overpriced.
Not discouraging you to invest... Depending whether your scholarship will let you take more classes... I'd rather slam 18+ credit hour semesters fall & spring then get a full time summer job to get enough cash to live off for the next year (summer sales job, potentially? A financial advisor is a glorified salesmen, so it could be beneficial to test it out one summer), then going to school at a slower pace, but make more money at a $10-15 an hour job.
Once you plow through your first 2 years of classes, then I'd probably slow down the pace and really figure out exactly what you want to do in finance/business. NETWORK. NETWORK. NETWORK.
To make $1M in 12 years, you'll have to invest $50k per year, making 10%. Again, not trying to discourage you; major props if you become a millionaire at 30. I don't think MMM himself was a millionaire at 30.
Great to hear on the scholarship!
If you want to make money in finance, Investment banking is the way to go. Financial advising will make great, ONCE you get enough clients.
I'm currently chilling in corporate finance making $66k at 27 (5 years work xp). Good luck sir!