Take advantage of others’ research
There are numerous excellent resources available that detail previous Jewish genealogy research. Along with encyclopedias and other books, there are a few excellent online resources that we would highly recommend keeping up with.
The most well-known of these is Avotaynu, which publishes a regular journal covering all aspects of current Jewish genealogical research. On the organization's website, you will also find a comprehensive list of useful books, an anthology of Jewish genealogy, and a variety of other resources.
Finding out more about your Jewish ancestors can be difficult at first, but there's no reason to give up before you even start. There are numerous tools available to assist you in your searches, such as DNA tests and genealogical software. You will also find a plethora of resources available on the internet, in addition to physical encyclopedias and books. When you find records, cross-reference them with other records if possible to get a more complete picture.