I completed my first official 5k, in 29:55. I was hoping to come close to 30 minutes and I beat that time, coming in 9th out of 26 runners of both genders and all ages. It turned out to be easier to run fast on a set course with other runners, with no streets to cross.
All my songs sound the same, even if I use different chords. So it is not that they sound the same just because of the chords. The one I am starting now begins I IV I IV ii V I. I use part of the first phrase of "I'll remember April." Later, I'll go back on find a different beginning.
Each endeavor is its own thing. The skills are not transferable. Still, everything helps.