Should I put as much money in just my Roth IRA or split between brokerage

I turned 18 2 months ago and recently I put 100 dollars into my Brokerage account. 60/20/20 VOO/QQQM/VXUS. Not trying to change that on this post. Essentially, I don’t make that much money. My goal is to invest 3750 (half the cap) into my Roth IRA this year. Thing is, I don’t really want to retire at 59 1/2 or withdraw my limited contributions early. My very optimistic goal is to become a real estate agent (no 401k) and hopefully retire before that age, or atleast be very wealthy and I don’t know if I want my money sitting in my Roth IRA at that time. I mean I’m young enough to were if I play it smart any account I invest in should grow a lot. Essentially, should I be splitting between the two even though I can’t max out my Roth IRA, or wait till I make enough money to max it out then invest in my brokerage. 59 1/2 is a long time away.