mm maybe it's hard because you're not familiar with how it feels. you could try achieving an OBE via indirect methods like using a technique when you wake up or through becoming conscious in a dream. i remember i started with listening to binaural beats and i just felt tingly. i wasn't really sure how i was supposed to feel so that wasn't really going anywhere. then i read up on the indirect methods of achieving on OBE and i was able to do it within weeks by becoming conscious in a dream. now that i was familiar with how it felt, ive been making much more exciting progress on achieving one consciously by simply remembering how it felt and just trying to give my body the same feelings while meditating, listening to binaural beats, etc.
http://www.astralpulse.com/forums/welcome_to_the_astral_faq/how_to_enter_the_astral_from_a_dream-t19319.0.html
http://www.astralpulse.com/forums/welcome_to_the_astral_faq/how_to_enter_the_astral_from_a_dream-t19319.0.html