Old account

I’ve had my account for years but never posted. I started posting now and even if i get a lot of likes and a lot of people watch the whole video at first, it just stops being shown to people on the fyp after about two hours. So i’m always stuck between 400-800 views.

Is there anything i can do about that or should i just make a new account.
Or is the problem that my videos aren’t interesting enough?
My account is @elif_krhn