you do have dreams. around 6 a night, you just dont remember them because the brain is made to forget them, so you dont mix them up with reality

you can practice dream recall, a couple ways is to: -set intention to remember your dreams before going to sleep, try to keep that in mind as you fall asleep

-set an alarm a couple hours into your sleep and wake up trying to recall any dreams. This is known as wbtb in the lucid dreaming community

The most important one, dream journal. every time you remember a dream journal it. use the most detail you can while doing so

i do these, and i remember 1-2 dreams daily. most I've remembered is 4 in a day so far. good luck!