Trading on here??

There could be a subreddit to this(??) I just don't really know how to exactly ask this question I don't often use reddit.

I've been to card shows, and as much as I love them I really just want to start trading more casually in a sense for really common cards that I cannot find at card shows and I refuse to pay $6 on shipping of a two cent card. And I LOVEE looking through my bulk for any type of pokemon that someone likes, is there anywhere where I can trade like this online?? Websites, discord servers, etc... I'd love to know please