You have…
168 hours in a week
-40 hours for day job
= 128 hours left over
-56 hours for sleep (8 hours/night)
= 72 hours left over
-21 hours for breakfast (1 hour/day), lunch (1 hour/day), and dinner (1 hour/day)
= 51 hours left over
-14 hours for relaxation (2 hours/day)
= 37 hours left over
-5 hours for showering/getting ready for day job (1 hour per day)
= 32 hours left over
-5 hours commuting time (1 hour/day to and from work total)
= 27 HOURS TO TACKLE YOUR REAL WORK/GOALS DURING WEEK
If your profession/day-job isn’t in line with your interest/goals, of course it would be better to quit the day job and try to focus on your interests. But some people don’t have that choice (and I would add, with the job market being the way it is these days, you’re damn lucky to even have a job to make money in the first place, so don’t complain (that day job is funding your other pursuits)).
And if you think 27 hours isn’t enough time to accomplish your goals, your delusional. And, at this point, just making excuses. One of the best classical guitarists in the world only practices for ~45 minutes per day, and sometimes not even every day. It’s not the quantity of time, it’s the quality. It’s how you spend the time that counts.
In sum… there are no excuses. If you’ve got goals (be they large or small) outside of your day job that you want to accomplish… GET. TO. WORK.
