Your choices make it appear that you plan to trade stocks. I would not do that because the questions you are asking about a Roth IRA would suggest that you aren't qualified to pick and trade stocks. ETFs have annual fees and trading costs, so a mutual fund would be your best bet.
When I did my research years ago, Vanguard was the least expensive for mutual funds. I don't trade stocks so I don't know about trading fees. You can make virtually any type of investment in an IRA. A Roth IRA simply shields you from paying any taxes on gains. (It also prevents you from declaring a loss.)
I recommend people have just one mutual fund in their Roth IRA. That's plenty diversity. I think the max investment for someone under 50 is $5,500. If you have more to invest, get a taxable mutual fund. The Total Stock Market and the S&P 500 funds are low turnover and incur minimal taxes. A tax-managed fund is also an option. One mutual fund in a Roth and one taxable fund plus an emergency fund should do it.
Check out books at the library on personal finance. The one mutual fund in the IRA is advice I got from John Bogle, the founder of Vanguard. I need to warn you his books are boring. Eric Tyson, Personal Finance for Dummies, is good. Just read a wide range of authors. Peter Lynch writes about picking stocks.
