How much growth to expect from long term investment?

Hey y’all. I got into stocks game only recently, over the past 6 months I invested 18k into diverse stocks. Obviously any time is a good time to buy, but since market is down as hell, apparently this year is THE year to buy. Dips still keep coming, but question is – what return should we all expect in, say a year? In 3? 5? I am guessing everything should at least double once the economy is back to normal? Sorry if it’s a noob question