I am a morning exerciser - not by nature, if I had my way I wouldn't ever get up until after 8am. However, if I plan to exercise in the evening it rarely happens - there is undoubtably something that crops up e.g. A present to buy, an extra thing for school, just life admin that I find builds up during the day.
What works for us is having set days where DH and I exercise - then I know if I miss that slot I have to wait a few days.
As others have said, regular vigourous exercise really does give you more energy, even if you have to get up earlier. It's tough in the winter but you never regret a session.
If you are short on time, the best is intervals ie HIIT, Joe Wicks or Fitness Blender style, videoes done at home so no travelling time etc. Make sure you stretch tho else knees etc will start to complain .
I run, swim, cycle and do pilates. The running and swimming are early morning, before DH and I are off to works. Cycling is on a day off or at the weekend. Again we agree in advance who has which slot. Takes a degree of planning but for us it's the best way to make sure we both get to do what we like and are training for.
BTW, my 25-year old self would think I were talking about a different person. But getting older and having a family have changed my perspective. And all the above goes out the window when I've been to the pub on a school night!