I want to get into comics. What should I start with?

I've always been a huge fan of DC tv shows and movies, and a slight fan of Marvel, but I'd love to read comics too to further my understanding. I've been meaning to read LOWW and I've read the brief-lived Young Justice, as well as about 5 individual Marvel comics purchased from Universal a while back. Other than that, nothing. My favorite stories are that of the Justice League and the minor characters on current DC shows, Deadpool, and the comic/show Young Justice. Please rec me any comics (prefer them to be mostly DC) that you think I should start with and I'd appreciate it if you could inform me where to get them as well. Thanks!

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