Just skip the manga. Read the Light Novel.
The manga tells you the SUPER, SUPER, SUPER generic bullet points.
The light novel explains why stuff happens and how it works.
The problem is there are 25 full books in the light novels and the manga seems to be trying to squeeze 350 pages into a 30pg manga chapter. By doing so many, many, many important parts are getting skipped.
The Light novel series I gave my first "10 Masterpiece" rating to.
This manga cannot compare.
---- small spoilers below
Small Spoiler for comparison:
Light novel: 5th birthday, Only 5th, 10th, and 15th birthdays are celebrated with gifts and are
for passing onto a new stage in life. *Gets gifts for use: wand, sword, etc. and his expectation are explained. He uses these items over the next few books*.
Manga: I turned 5! Party. "Thanks's for the gifts (random gifts in his hands)". end...
This misses the whole point of the birthday, it was not about celebration, but about getting tools for life and survival. Not a "frolicking children's party".
2nd small spoiler:
Manga starts when he is like 3, missing the whole first 3 years of his life. They could easily written at least 3 solid chapters from this time.