It takes time. You just have to remember that with each copper cent you find you are essentially doubling (or, if copper gets high enough again, tripling) your money. But if you are expecting CRHing to make you rich, or make money, you are deceiving yourself. Rather, CRHing is more like gambling, unlike gambling however, you can cash in a losing ticket for the price you paid for it.
If you are looking for the most money for the least amount of time, it would be better for you to get a part-time minimum wage job, or work overtime. With CRHing, if you are lucky for every hour you spend CRHing, you make about 50 cents. Most of the time though, you are losing money due to gas, dumping errors (dimes being counted as pennies for example) or rolls that are a few coins short.
CRHing is a fun hobby, and if you are lucky you can make a bit of money doing it, but from a time to profit standpoint, it would be a lot better to get a part time job and work for minimum wage when you would be CRHing and then buying coins with your paycheck.