You're spot on. I've just been listening to a podcast with Naval Ravikant in which he discusses these points around being in the present and trying not to think about the past or future.
You can listen to it here - https://www.fs.blog/2017/02/naval-ravikant-reading-decision-making/
It's long but well worth a listen. You're kindred spirits.
Cool I like learning from new perspectives. Thanks for the link I'll give it a go.