A good way to learn for the exams is to go to an aviation meteo site and get a password for it.
Then decode a TAF and a METAR and compare the content to the synoptic chart and sig wx chart for the same period. You might also want to compare it with the weather outside. It should bear some resemblance to the reports.
There are many exam questions that ask exactly this; match a synoptic chart with the correct TAF.
Tips for synoptic charts: how does the wind circulate? where does the airmass come from? is it stabe/ unstable? Is it dry or wet? Does the front move?
Also, about half of the final exam deals with wx theory, the other half with wx reports.
This website for example:
Belgocontrol - Operational