If you’re looking to cover mostly all the markets across the world. A little while ago I made a portfolio for exactly that. It’s using all vanguard funds as I like their low fees.
Obviously make sure you do your own research before investing. But has worked pretty well for me.
I tend to use justetf.com to screen them by sector and then select from the ones with te lowest fees. I would always have a look at the investor documents to check what they invest in and their annual fees.