Lots of options! More and more WebRTC SFUs are adding WHIP support. Check out https://galene.org/ it lets you do OBS in and has things like chat. Might be better if you are streaming to family and want chat. I would try and find a VPS that is best geographically located.
Cloudflare if you want this quick. Even though it is proprietary you have no vendor lock in, just change your WHIP URL in OBS if things aren’t going right.