over the past 90 days the most you've spent on puzzles in a day (atleast on chess.com) is 30 minutes, with an average of <10 minutes.
Most games are decided by tactical mistakes, it is most players bottlenecks (including mine). You will see immediate results from developing your tactical senses. Less blunders, more punishes, more yummy elo points.
The more you put in the more you will get out. Chesstempo is a great free alternative for puzzles I use as well.
I am seeking help for help to break 1500. Please join me.