I don't really like forums too much, and was wondering if maybe there was a subeta Discord or something of that sort? I just can not get enough of this game and need to talk about it with more than 3 people.

Well there is always the shoutbox, it is a bit like discord but it is on-site.

There's a small group on Reddit

I would highly recommend not going on Tumblr or Reddit. The Subeta-related communities there (at least the ones that I've found) are very negative toward the site. It can be...demoralizing.

There is a Discord! But since I don't know anything about Discord, I can't direct you any further than that.

Also, you said you don't like the forums, but you might try joining or creating a forum group where you can chat with friends more freely about Subeta or whatever you like. :)

Subeta does have a Discord. It is not very active.

Apparently you need an Invite? I am already in, but I don't understand Discord much. If anyone knows how to do that I will invite you if it allows regular users to do that.