Can I use my Bitcoins to buy household commodities just like ordinary money?

Can I use my Bitcoins to buy household commodities just like ordinary money? You see, I’m a newbie and have yet to learn the basics including all the facts about Bitcoins. However, I want to be ascertained as to whether my time and efforts in learning the trade will be rewarding in such a way that, I’ll be able to use whatever amount of Bitcoins I may earn someday to actually purchase things from the nearby store.