Try sleep hygiene techniques and relaxation techniques.
Sleep hygiene-
1-make a routine plan of sleep and wake up time
2- reduce mobile or tv time specially before bed 2 hrs no screen time
3- no stimulant substance eating/tea or coffee after 5 pm
4- try condition therapy where you associate your bed with sleep- go on bed only when you feel sleepy, other for nap or any other activity don’t use bed nap on chair
5- do exercise, after food walk
Next Steps
Relaxation tech- progressive muscle relaxation and breathing exercises it’s lengthy to explain here
After all this trial for 1-2 week if your problem still persist consult on video consultation I will guide you further.