I transitioned to a “brokerage IRA account” as requested by Vanguard a few years back, while my wife’s account remains a “mutual fund IRA account.”
The latter makes things quicker and easier, although now, there only seems to be a one-day difference between the two different processes for the different account types.
Vanguard is the company I use, and it’s one that tends to be favored among many index fund investors, so that’s what you’ll see here.
While income limits are a non-issue for the backdoor, there exists one important prerequisite to be able to properly execute the backdoor Roth.
If you do have these types of accounts, you’re not hosed, but you need to have a strategy to move that money elsewhere or you can forget about the backdoor Roth.
If you haven’t done so already, you’ll need to open a Traditional IRA. I won’t walk through all the steps, but it should be straightforward.