Thanks for the chapter!
Seems like Diana will be able to give him a decent tutorial. Should check her status. If reading status right while Golem summoning is usually terrible with the cost/performance ratio (like a car that really burns up fuel fast,) it only costs him 1/100 of the mana to create, control and move a golem around. So if doing all three costs 1000 mana it'd take him only 10. Also, learns Earth magic at three times the speed of everyone else, but can only use Earth magic as a consequence so not even a minor fire magic spell to light fires with, no light spells, no heal spells, no nothing no matter how simple unless it's part of the Earth magic tree. Wonder if he create a pair of steel and flint stones in a fire and have them rub themselves against each other to start a fire or turn a rock into a very luminescent material to use as a light source to improvise Earth magic into similar results of other magic? Like using footsteps on the ground to detect incoming non-flying monsters, location of specific herbs growing, or where fresh water is collected and other stuff like that.
In any case, agree that god character only reincarnating him as a source of fun and not to be fully trusted. Maybe he'll get lucky and meet one or two other gods who are of the caring and helpful variety.