Where do you buy Monero? Haveno, CEXes or instant crypto exchanges?

No, Haveno is completely Non-Kyc.

The only problem with Haveno is that you need to pre-own a small amount of XMR as a safety deposit to avoid scams. So it is not the best if you need to get started from scratch. (You get your deposit back after the trade)

Haveno essentially generates a wallet for you that you use on trades, so when I say "add funds" I mean to that new wallet (which is locally generated and thus non-custodial, keys are always under your control)

Once you add some funds to Haveno, just click any of the offers listed there. You'll probably need to add a payment account to your haveno account but the app will guide you through all the steps. There are some tutorials floating around there.

Sounds daunting but it really is super super easy

They are refering to the monero requires to make or take an offer. Also no.