1. take a map of the world
2. select area you wish to look at by longitude for example 90E TO 110E .
3. where will the itcz be in jan for example
and pinpoint selected places along the itcz.
4. all winds meet at the itcz from above and below. check direction of WIND from above itcz and beneath.
5. does the wind track across water or land. this will be indication of wx. tracking across water,moisture pick up ,cloud, rain.
6. dont forget wind changes direction when it crosses the equator.
7. now where will wind come from.generally in summer: sea to land. winter: land to
sea
if you can grasp these basics hopefully your understanding will begin to build.
i hope this helps. regards