I have to agree with what has been said so far: shoot as much as you can, getting your own "style", before you start worrying about the technical side of this art.(posted 9874 days ago)But if you really want to try filters, then I think a good way to find out what they could give you is the following: start with one filter, say green, and then shoot a couple of films (or more) where you take every picture twice, with and without filter [make sure you have the right exposure with the filter, as it lets less light in], covering as many subjects as you can. This way you'll find out what the filter does to certain colours, skin, backgrounds, walls, woods and whatever else you might be interested in photographing.
This is what I did when I bought my first filters, and I think it's a fairly systematic and straightfoward way to discover their benefits.
Have fun. ///ulisse///