How about "sogou pinyin"?I'm using it now~ http://files.sogou.com/sogou_pinyin_52b.exe

frist you must learn lisening chinese ,watch catun.then you can find a chinese teacher to learn pinyin .and buy some books that chinese students books from grad1to grad 6.and ,you must conmunicate with people who is chinese

use google pinyin input software here is it http://dl.google.com/pinyin/v2/GooglePinyinInstaller.exe

personally，I prefer to use "zi guang pinyin "(it's a program for entering Chinese characters, using pinyin http://www.unispim.com/software/index.php (This is the official site for u downloading.)

There are some Chinese student books from grade 1 to grade 6,I think they can help you best master the basic Chines prounciation and some words.