Good job. As I said, your instinct is correct. 24 funds is far too many. Things to watch for:
Don't let the Fido person sell you on multiple funds that hold basically the same stocks. If he claims this is diversification, find another Fido person.
Don't let the Fido person give you multiple funds where one will do. For example, buying a large cap fund, a midcap fund, and a small cap fund might well produce the same results as a total market fund. It depends on the proportions but you can check it in portfolio visualizer after the meeting.
ETFs and conventional mutual funds are the same thing to an investor. You aren't going to trade (you're not, are you?) so the trading advantage of an ETF is a don't-care. Focus on fees. Read this before you go:
https://www.morningstar.com/articles/752485/fund-fees-predict-future-success-or-failure.html
When a Fido fund is proposed, ask how its fee compares to the equivalent Vanguard and Schwab fund fees. Fees are basically a street brawl right now, so you have to look carefully. I'm not saying Fido will be more expensive. After all they even have a couple of zero-fee funds, but none of these firms can be totally trusted to have the lowest fees.
Get the proposal, go home and think about it. Play with portfolio visualizer. It can't predict the future but it is a great way to compare history for funds and portolios -- and history is all we have. We don't have predictions.
Let us know how your meeting goes. Other forum members will be grateful to learn from your experience.