Sleep hygiene
First of all sleep patterns are genetic. Look at your mom and dad and family members and note their sleep habits

Second same time every night. Watch same show. Take hot shower.

Third. Natural sleep aids. Lemon balm tea. Or if you can find lemon balm mint just grab a leaf and eat it.

Fourth. Environment. No electronics in room. Perfectly dark and quiet.

Having worked as an assistant to a doctor in a general practice i know that if a person is not getting restorative sleep at night not much else can go right mentally during the day. Sleep and specifically REM sleep is a must for good mental health.

If you try the above and are positive you have done each step and still cannot sleep then you have something else going on health wise and I suggest a sleep study and a sleep specialist.

You did not mention if you sleep with another person who may be able to tell you if you are snoring and or have sleep apnea which is another story fir another day.

You also did not mention whether you are taking any other chemicals or prescribed meds which may be interfering with your natural sleep pattern.