Can you pray nightly prayers (tahajjud) if you do not pray other sunnah prayers?

Can you pray nightly prayer even if my usual prayers aren't up to the mark? I usually stay awake at night and I end up thinking maybe I should pray but since I mostly only pray obligatory prayers and not sunnah out of laziness I feel like I can't pray at night? I want to know if there is a ruling about this thank you

You can perform voluntary prayers whenever you want at any time of day or night (except during the few minutes when the sun rising or setting). And if you do not perform the usual sunnah prayers that is all the more reason to perform the night prayers when you feel like it.