I think you'd be a lot happier at Fidelity. Ameritrade is a roach motel for money.
I had my niece a nephew's custodial accounts there at one time because they were one of the few firms that allowed custodial accounts to age 25, as optional under California law.
We each also keep $100k at Merrill Lynch for the sole reason that we bank with BofA and the $100k provides a 75% bonus on cash back credit cards.
I've recharacterized ROTH deposits at Fidelity and it takes one day. At Merrill it takes months, phone calls, cajoling, and even then it's problematic and error prone. I suspect all they're missing from 1970 are the vacuum tubes for delivering paper forms. Sort of a deluxe roach hotel for money.
We've run out of other people's Social Security taxes needed to subsidize our low income tax rates.