Earle42 has some good input. keep in mind that most modern coins that you will find in circulation were minted in the billions and are basically worth face value.
one tip I can give you is dont fall into the grading trap. since it seems you are quite new, most have no clue what it costs to have a coin graded. a single coin at PCGS would cost about $100, NGC about $60, ANANCS about $50 and CACG about $100. as you can see you need to have quite a valuable coin to go through this process without chewing up all the value of a coin.
your are not going to get rich searching coins in circulation but you may find a few every now and then that have some value. dont believe everything you see on social media like " I found this 1804 silver dollar in a wall" or "this coin could be worth $500,000. its your time to do with what you want but if you are interested in numismatics, start a collection of a series that you are attracted to while looking for that elusive coin. it will be more satisfying.
happy hunting and remember that the folks here are here to help. if you find something post it. we will be glad to give you an honest opinion instead of trash you. everyone started somewhere and everyone is still learning.