Chris,

I'd shy away from trading apps unless you know what you are doing. Really know what you are doing!

Look at a Fidelity or Vanguard balanced or aggressive fund for say 2035. That will have a mix of stocks that will grow as well as likely to provide some income. You don't want to much income as you will be taxed on it at your current rate.

Vanguard generally has lower fees.

Email Fidelity and see if you can get a call with one of their advisers. As always, try and pay off loans or credit cards first as they will be at higher rates then savings rates.

Hope this helps even a little bit and good for in getting into a good position.

Ian