Polarizing filter for fujifilm FinePix digital camera A210

I'm not sure you can use a round filter that fits into the mouth of your lens. The manual does not say anything about thread size. But there should always fit a P type filter set. Kood has "cheap" sets. There are a lot of Chinese firms that are in this market. There are lots of other brands and it could be you can buy a filter and holder paying more than your camera is worth. A P-type adapter ring from KOOD is less than $10, and a filter from $30 (46 mm) till almost $100 for 86 MM.
Only if you are making lots of pictures in sun light and you want to have that touch more, you should invest in polarising filters, because they are very expensive. For your digital camera you only can use circular polarising filters. (That goes with every digital camera)