You must dedicate time to it before you start practising. You must decide it, and take seriously. Astral Projection usually takes some time to be learnt. However, with will and calmness anything is possible. Search up as much as you can, Anything. Techniques for AP, what to expect on Astral plane-different kind of entiies..tecuniques to go in trance, What is Astral Projectioj etc. There are many you need to know, and you must understand what it is and how it works before you try.
Astral Projection requires warriors in heart, remember that.
One tip: Never try to force Astral Projection or anything. It just makes it much worse, and I'm talking through personal experience. I was tired of failing, and I was trying to force and force it, but the results wan't well...
So just be patient, and if you need any breaks Take them! As long as you need to be refreshed-during the breaks you must forget comoletely Astral Projection, it will help you.
If you mean "anyone" generally, then yes, anyone can achieve Astral Projection. However, a large amount of individuals quit completely because they don't have the inner strength/aren't strong psychologically; they are not warriors in heart...