THIS IS A LONG REPLY
@Michael Kantar kid, you're right on track. Anyhow, first things first. First off, startearning stuff! See, you can go on Udemy and websites like that, to learn some decent skills and what not. Second, open a minor account with your parent/s as guardian/s. Mow lawns, or apply those skills from udeny and stuff for earning money. Put that money in your account. You can open savings accounts and get interest on your earnings. Get a joint credit card with your parents and use it once in a month, at max.
See kid, you're ambitious, I see that. But, sometimes, you just have to wait. You can get a trust created by a lawyer. You get all the deals done, look for properties and what not, in the end, get your parents to sign the contract. That's one way to do it, I wouldn't go for it. See, it's still too early for you. You should focus on learning stuff. Get some cool skills under your sleeves. I mean coding, internet security, even photography for that matter. You can take photos and upload them on shutterstock and get royalties from them. There are unlimited possibilities. You just need to educate yourself more. The ambition I sense is good, and bad at the same time. You're actually in a hurry to pull the trigger. This haste makes me think that you're not ready. I mean, deep inside --I, too, think that what would a 14 year old know. Anyhow, to cut the story short, look for deals on Zillow and stuff, do the pretend deals and see how things go in the next 4 years. While your pretend investments are booming, get education under your sleeves and earn money from them. Save all of your money and use it to invest when you're 18. While you're growing up, you'll be building some strong credit with the joint CC. Your income would be increasing, and you'll be getting interest in your bank accounts. If you're good at swimming, start taking part in competitions. Have a formal Instagram account. Maybe you'll get some ads to put on your gram account. Learn as much as you can, doesn't matter what you learn, it does count!