Ask HN: Resources for Adwords / Facebook Ads?

My SaaS company (it's a fintech for wealth management) has got to the point where we're growing pretty fast through direct sales, but I'd like to complement that with some Google / Facebook ads. However, it seems really hard to find good resources on getting up to speed at the founder level. (There's certainly a lot of low-quality clickbait, but I'm looking for something with a more analytical/engineer approach.) Are there any resources you would recommend I check out?