First, your energy levels matter more than your time. Do your best to get enough sleep and eat healthy. If you have time to exercise for at least 15 minutes (or at least walk for 15 minutes) you may find yourself more alert and energetic.
As far as time goes, figure out where you can squeeze things in:
Do you commute? If so, and you drive, listen to podcasts. If you take public transportation, you can also read blogs and maybe even code (if you're on the train for example).
Do you exercise (you should if you can)? Listen to podcasts.
Do you wait in lines? At restaurants, banks, car mechanic, grocery stores? Read, read, read. Use something like Pocket to queue up things you want to read ahead of time.
Do you watch TV? Unless you watch it with the kids, you can probably eliminate this activity and get a lot of free time.
Your attention is limited so try to minimize as many distractions as you can. Disable notifications on your devices, use something like Pomodoro technique to get the most out of your time.
Be patient. And stay strong. I empathize with you - as you already know I have 2 jobs and 3 kids (one of them is 1 month old).