With a commute that long, don’t do workouts in them, just ride. At least until the rides feel easy.
Also do things to make it easier - don’t carry bags and wear proper bike kit. Deposit everything you need in work on the days you don’t ride there.
Make sure to eat enough during the day.
Have one day of the weekend completely off.
You will get less tired from it over time and might have even have energy for a workout at some point.
Long commutes are a great way of racking up a lot of hours on the bike, have fun!
Oh, I used to do a 38mile each way commute 3x a week, plus a longer weekend ride. It’s totally doable, as long as you have the extra time it needs. It’s really nice coming in in the morning, after being out in fresh air for a ride, hearing the birds etc.