First time rental, tenancy in common, partner

[Travis Konermann]

hey biggerpockets users, So I wanna get in on my first deal and I'm 18 years old with little capital but my mom is about to buy a new rental property because one of her renters wants to upgrade to a three bedroom (great renters always pay on time) and I was wondering what the best way to structure a deal between me and my mom where I maybe get 30% of the interest in the property by putting up maybe closing costs and doing a lot of the fix up labor. Any helpful input on how we could structure the deal would be great!