your english sux dude, learn to compose sentences, i cant (and i probably speak for lots of people) understand what your asking..
you cant pick the bottom strings (theyre called bottom strings, not top strings, lower frequency - lower strings, or something like that), why not?
acoustic guitars are also harder to learn to play on, because you have to lean on, or lean over, the dimensions of them..
all "air guitarists" that dont play guitar, always use their wrist to strum the strings, so im wondering, how long have you been playing guitar for?
the direction you point your pick, in relation to the strings also may be tricky, i know for me, straight down picking, i hold the pick point more towards the floor, by about 20-30 degrees from right angle to the guitar, and for alternate, i hold it at right angle to guitar/strings for lower strings. for higher strings, i always point pick towards floor those degrees
enough ranting...
explain again your problem please, and then we can help you