What are some good resources to learn how to read Hebrew well enough to participate in davening?

I’m not particularly religious, but my family is. I spend a good amount of time with them – holidays, dropping in for dinner on Shabbos, funerals – and at gatherings I’m starting to feel a little sheepish about being the only person staring at a siddur blankly while everyone else is mouthing or singing along. It’s been a long time since Hebrew School or my Bar Mitzvah!

Is there an app or resource I can learn from that might help me learn at least the basics? I can’t imagine I’ll ever be some scholar, but being able to at least tentatively follow along would make me feel like less of an interloper during these parts.

Thanks!