I am new to Finland research, also, so I can understand your confusion. However, as you seem to know where they lived, it does help. Finland had the system of naming after the Father’s first name and is called Patronymics. The farm name was also used (often with the patronymic name as the middle name!), which certainly can complicate everything. HisKi is still working on records along with Finland’s Family History Association (SSHY) , which are fabulous, if in the right time period! Most records, up to about 1880 or so, where in Swedish (and then in Finnish).
My suggestion to you is to visit www.familysearch.org
and review what records are available for that area. I have found that the Communion Books (Kirkonkirjat) are great for identifying families and often, have the page number to follow the family back in time! Many records are on microfiche which are very reasonably priced, if you have to bring them in to your local family history centre. Moving In and Moving Out records may also be helpful, if they have left the parish.
Language is a problem…. so at the familysearch.org, under LEARN, they have some helpful basic language guides for Finnish and Swedish. Also, you can use translation sites on the internet to help with further information. You cannot be in a hurry to do Finn research!!
It is hard to find someone who isn’t scared of the Finn records to help you! Let them know that many of the records are in Swedish… it seems to help! Good luck!