I use Google Cloud Build + Google Cloud Run and it’s built in, so no

I have a couple large customers (as in $billion+ companies) and I got the contracts because I knew people at the company, or knew someone who knew someone. Remember the foundation of business is trust. Getting a referral is basically a shortcut to them trusting you. If you then go on to do good work for them you can get a very good thing going for yourself.

Honestly if I worked at YouTube and they asked me to implement this I’d quit.

Two that immediately come to mind are “NAND to Tetris” and “Crafting Interpeters”. Both are free and excellent.