To start off his learning process, Alex decided to start with pills that he would consider to have significant importance to anyone.
Those pills being healing pills. Under a normal scenario, he no longer required any healing pills, but it wouldn't be a bad idea to know how to make one just in case someone he is close to gets injured.
Saint-ranked healing pills were all capable of not just healing, but also regenerating lost body parts. Since they were so good, Alex started learning about the pill that he had downgraded for when he was a True realm cultivator.
The Saint Body Regeneration pill.
Alex started with the Blood Spirit Ginseng and closed his eyes to learn about it. Information that was stored in his mind slowly flowed into his brain, no longer a jumbled mess but an understandable piece of information.
He learned what sort of ingredient it was, what it looked like, and where it grew. Alex was surprised he knew how to extract it from its plant without damaging it.