How to tap into the “nothings ever that serious mindset”

Lowkey I’ve been thinking about it and I used to stress over the smallest things thinking there was no solution or I was doomed but now I’m kinda sitting here looking back at old pictures when I was more confident but also stressed a lot compared to me now, working on rebuilding the confident and carefree and I’m realizing nothing is THAT serious, unless it’s life threatening/changing ofc