How do I quiet my inner monologue

It just never shuts up. I’m just constantly in my head thinking about stuff and I can’t focus on or enjoy anything because I’m so stuck inside my head. It’s not even bad things 24/7 either my thoughts are just so loud I can’t focus on anything else😭 I was on an SSRI and it stopped it but the side effects were so severe for me I had to stop, and ideally I don’t want to be on medication. It’s like I’m stuck in my own little world and i just want to be able to live in the moment and enjoy things rather than live in my head.