Try an au pair?

There is a Hebrew immersion school in Kemp Mill Maryland. It’s run by/for Orthodox Jews so there are religious/cultural aspects but it isn’t exactly a religious school (ex: they close early on Fridays in winter and make challah in the classroom but don’t teach Jewish law or customs).

If not find a nice caring daycare with caring people. It's what matters

You can speak your mother tongue at home.
I know this toddler speaks German and Spanish at home and speaks English and Spanish at her family child care home (daycare)
It's amazing

Silver Spring, Maryland has Jewish daycares, I think they start at 18 months old

Try an au pair from any country like others

Hello, are you by chance still looking? If so I have an experienced Hebrew-speaking nanny who lives in DC to recommend. Contact Tova at 919-349-1239.

If so, expect to pay $$$$ for that person

Good question! it's worth an ask (thank you!!!)

Sorry can’t help, bu I wish you luck finding someone. You could put out an ad asking for someone fluent in Hebrew. Maybe someone’s spouse from someone who works at the Israeli embassy?

This is the longest of long shots, but: we're looking for Hebrew-speaking/immersion child care in anywhere in DC proper for a child who's still way too young for any sort of preschool or pre-K (iow: not age-eligible for JCC or Sela or anything like that for a while.) Can't do the au pair thing, unfortunately; no room.

We'd be happy with an in-home or small daycare center, nanny or nanny share just generally... but since we're a bilingual OPOL home and the grandparents and younger relatives overseas don't speak English, the dream would be a child care provider who speaks Hebrew, to help us on that front between visits. It looks like there used to be an Israeli/Hebrew immersion daycare out in Rockville that may or may not exist anymore - but everything else around here even remotely in that vein seems to be for children who are all older, all basically English-speaking, and mostly (except for the JCC/Sela, which are limited to older kids) some degree of religious, which we aren't.

I know that secular Hebrew immersion daycare and nannies are a thing to some degree in NY, Chicago, LA, etc - but I can't seem to find them in DC. Are they not a thing here? (I realize they may not be a thing here.) Doesn't have to be mother tongue! Just someone who speaks enough ulpan Hebrew to communicate with a pre-verbal toddler.
If anyone has any tips or guidance or experience to share, we'd be eternally grateful!
Thanks