Buffets 90/10

Hi all,

I’m very new to trading and it was suggested to follow buffet’s 90/10 plan. The idea of putting a bunch into stock index fund and 10% into government bonds is a little daunting. Can anyone elaborate to me being new what stock to buy to do so?

I usually save my money but with a newborn in the way in a few weeks, I’d like to get into something more than just a savings account.