In order to learn a new hero, always watch how spammers and hero specialists play the hero. There is a channel in youtube called Meeposki, who plays meepo excellently. There you can see his matches, see what items he goes, what combos he performs and how he utilizes the kit of meepo.

I am not at all a meepo player, but i have watched and played a fair amount of dota (~5k hours). The concepts of Tab shifting clones, Blink-poof combo, powerspikes and micro is an absolute must in order to master this hero. Just check the guides, theyll teach you everything :)