For conversion to Reform Judaism, consult your local Reform rabbi. Since secular Jews have no organized 'ism' and tend to define Judaism purely in terms of ancestry, there is no real path to conversion to purely secular Judaism. Note that conversion to Reform Judaism is not quick and easy. Typically, it involves a long period of supervised study, including regular attendance at Jewish services, plus appearance before a beit din (a Jewish court overseen by 3 judges). You'll be warned that conversion is not required to be seen as righteous, and that by converting, you are exposing yourself to potential attack by antisemites.
His father is Jewish and his mother is a convert to Reform Judaism.
It is likely that he converted to Reform Judaism because that conversion is much easier and Natalie Portman is not terribly religious (dogmatic) herself.
His father is Jewish and his mother is a convert to Reform Judaism.
Union for Reform Judaism was created in 1873.
Reform Judaism prizes Jewish Identity over Jewish ritual.
International Institute for Secular Humanistic Judaism was created in 1985.
No. Reform Judaism started in Germany, in the 19th Century.
Society for Classical Reform Judaism was created in 2008.
That is quite literally between you and God. Conversion to any stream of Judaism requires a period of study under the supervision of a rabbi, and then examination before a beit din, a rabbinical court composed of 3 judges. The decision as to what stream of Judaism to convert under is not necessarily easy. You really need to explore Judaism and find which stream works. Reform Judaism, if taken seriously, is not "Judaism lite" because, ideally, a Reform Jew should fully understand the tradition before deciding what aspects of the tradition to keep and how. The internal divisions within Judaism are, for many potential converts, one of the most difficult parts of the path to conversion.
Yes. Reform Judaism has allowed for female Rabbis for over 50 years.
Religious Action Center of Reform Judaism was created in 1961.
Reform Judaism is the most lenient branch of Judaism, no matter where you live.