Summary. A shul is more than a building; it is the kehilla (community) within which Jewish life unfolds. The New Jew's choice of shul shapes daily practice, friendships, the rabbi they consult, the children they educate, and the Shabbat dinners they eat. Visit several before settling. Attend on multiple Shabbatot. Look for warmth, halachic seriousness appropriate to your hashkafa, and a willingness to welcome a newcomer. The best shul is usually the one within walking distance with a rabbi you can call.
What to Look For
Walking distance — for an Orthodox shul, this is non-negotiable; for any shul, it shapes whether you become a regular.
Hashkafa — Modern Orthodox, Conservative, Reform, Reconstructionist, Renewal, Sephardic, Chabad, or other Hasidic. Each has a distinct ethos.
Size — a small shul (50–150 members) offers intimacy and faster relationships; a large shul (300+ members) offers more programming and anonymity. Both have virtues.
Warmth to newcomers — does someone greet you on a first visit? Is there a hand on your shoulder at kiddush? Some shuls are genuinely welcoming; others are not.
The rabbi — do you trust this person to be your posek (Halachic decisor) over years and decades?
The kiddush — does it linger? Do people stay and talk?
Programming — adult learning, youth, family events, social action. A shul with active programs has a community that meets outside the sanctuary.
How to Visit
Attend at least three Shabbatot before deciding. Vary the service (Friday night, Shabbat morning, weekday Mincha). Stay for kiddush. Introduce yourself to the rabbi after services; ask for fifteen minutes during the week. Email or call the shul office ahead of time on the first visit — most shuls appreciate the notice and will arrange for a member to greet you.
If There Are No Good Options Where You Live
A surprising number of American towns have only one shul (often a Reform or Conservative congregation founded in the early 20th century). If the local shul is not a fit and there is no alternative, the choices are: (1) attend anyway and make the most of it; (2) drive (or move) to the nearest fit; (3) home-Shabbat with a chevra of like-minded families; (4) seek out a Chabad house (which exist in many smaller towns). The Editor counsels against giving up on community; davening alone is not the long-term plan.
When You Move
Choose where you live partly on the basis of which shul will be within walking distance. For the Modern Orthodox New Jew especially, this can dictate a neighborhood. The OU's NextDor program and Chabad's Shabbat Hospitality Network are useful tools when relocating.
Where Denominations Diverge
Each denomination has its own umbrella organization that can help locate congregations: OU (Modern Orthodox), USCJ (Conservative), URJ (Reform), Reconstructing Judaism, Renewal/ALEPH. Chabad's worldwide directory is at chabad.org. Sephardic and Hasidic communities tend to be more locally networked; ask in person.
Sources
Talmud Bavli, Berachot 6a — on the merit of public prayer.
Rambam, Mishneh Torah, Hilchot Tefillah 8.
Shulchan Aruch, Orach Chaim 90 (the importance of community prayer).
Further Reading
Joseph Telushkin, A Code of Jewish Ethics, vol. 2 — chapters on community.
Ron Wolfson, Relational Judaism.