lnbook VS Breez Mobile Client

p.s.: if you're unfamiliar with these terms, I suggest you read the How the Lightning Network works chapter of Mastering The Lightning Network by Andreas Antonopoulos. It's not too technical and if you have a basic understanding of Bitcoin, you won't have any trouble reading it.

Mastering the lightning network

You can read all about it here if you are interested: https://github.com/lnbook/lnbook/blob/develop/12_path_finding.asciidoc

I don't know about videos, but if you want to go technically deep, good start is Mastering Bitcoin (https://github.com/bitcoinbook/bitcoinbook) followed by Mastering the Lightning Network (https://github.com/lnbook/lnbook)

Lnbook getting closer towards being finished and can already be seen at: https://github.com/lnbook/lnbook

No problem. If you want to deep dive into LN, there a free and open-source book here, the first few chapters explain a lot about this without being too technical, and the following one really go deeper: https://github.com/lnbook/lnbook/

I recommend you to read Mastering the Lightning Network, especially this chapter, which explains the basics of how the LN works.

Check out the Mastering the Lightning Network book

To accept Bitcoin payments, simply install Breez Wallet into a phone. It has an incredible POS, works with on-chain as well as r/thelightningnetwork.

1) Install Breez https://breez.technology

That comment is incorrect too from a few angles. Both Breez and Phoenix's code is entirely verifiable on their GitHubs (Pheonix Breez). If you're truly concerned about them changing the code in an update you can verify and build the app yourself locally and install it on your phone.

https://phoenix.acinq.co/ https://blixtwallet.github.io/ https://breez.technology/

https://breez.technology - Breez - excellent POS for small business owners as well as integrated Bitrefill or LN Pizza

Try Phoenix Wallet (my favorite), Breez, Muun.