[ohlookwhatsthat]

I do love the job, in some ways it’s a dream job, but I just don’t have the energy to learn it or concentrate on it.

[jasfi]

More exercise and an improved diet would likely help a lot.

You may struggle for time to exercise from the sound of it, but even a little bit helps.

[dunno7456]

+1 this, as it also helps to sleep better and that makes a huge difference.

It's important to be consistent because it takes some time to start noticing the benefits.

Also, create a bed routine and stick to it. For example, taking a hot shower, brushing teeth and then going to bed right after help to slow down a racing mind.

Reading a book before bed as well, I'm always impressed how much I can read and how slow the time goes by and I'm already sleepy.