Vocalisations are an excellent evening wind-down and on-ramp for easy sitting meditation. In fact they are so effective that you might not need the sitting meditation at all.
You will feel self-conscious at first. Explain to people what you’re doing. All cultures I know of have chanting and singing and vocalisation as part of their religious traditions. It is a meditation and a mental massage rolled into one, and once you start to see the benefits you will not want to stop.
I like to do these in the bath. A hot bath increases serotonin and lowers norepinephrine, which combines with increased tonic and decreased phasic dopamine and an increase in cranial bloodflow to make the perfect chemistry for a comfortable sitting session afterward. Buddhist traditions precede meditation with chanting for a reason. After 10 minutes of this all of the mental tension from the day will be gone.
Don’t add words and don’t overthink things. Just sit there and take a breath, then on the out-breath start to hum. Play with frequencies until you find one which reverberates nicely in your skull, and then rinse and repeat. Keep the frequency the same if you feel a mental knot being worked out, or change it to move it around your skull and massage different parts of your brain.
You can keep this as a hum or open your mouth. You can change the shape of your mouth cavity to move it around your skull further and get the vibrations closer to your temples. You can increase intensity and tone to vibrate your frontal brain or lower the tone and tilt your head slightly to bring things down to a relaxing finish.