I hope you do know that it's not every scenario you can use filters to shoot better pictures. If you do not know if the particular shot you want to shoot requires filters or what type of filters (CPL, ND, GND etc), I doubt you need them yet.
i personally don't use any filters on the 50 1.8..
cheap filters degrade the quality of image..
good filters will already cost half of the price of the lens..
besides, the front element is recessed enough to provide some sort of protection..