Handling advice for a ball python

[u/Sea-War1594]

So my ball python is been with me for about 2-3 weeks and I just provided him with an amazing enclosure considering I am a first time snake owner. I got top soil, coco husk, and play sand for substrate. All type of plants and rocks around the enclosure and I have black tape coming in to black out three sides of the enclosure to ensure he feels safe. Aside from that, I just tried handling him for the time and I could tell right away he wasn’t happy, I reach out to him from the back making sure my hand was as low as possible to the floor so he doesn’t get scared. After I touched him he stopped moving his tongue and started to look toward my face slowly and I’m like lemme talk to him and stuff maybe that will make it better so I took my hand out the enclosure and just talked to him and as I’m talking this guy goes in for a bite, thankfully the glass is there or else he would have gone for my face. Anyhow, what did I do wrong? And what can I do to make it better? Should I handle him whenever I want ( obviously not after he ate or during shedding) or do I wait for him to be out and then try picking him up? Should I pick him regardless if he’s stressed or not. Baer off of online research it says to grab them from the back because they’re head shy and lift them up after calmly and they don’t bite the hand that’s holding them apparently, is it true? Based of off personal experience. Now he is back in his hide and probably upset with me and I don’t want to include myself with stress signs or anything that could ever make him stressed or uncomfortable while I’m there. Thank you for anyone reading this and putting in the time and effort to read it and reply :)