I think it's nice that the MC is made to recognize how strong he is early on.
There are several mangas that forcefully play on the naive adventure who thinks himself weak, to the point that I expected this to be yet another one of these, so it's a refreshing change. It's also way more realistic than those others who play on exaggerated misunderstandings and unrealistic ideas about power-levels.
It's also a nice change of pace as the MC doesn't drag an inferiority complex and doesn't wimp out on every interaction with mildly strong individuals. Now, we'll have to check if that goes to the other extreme where he gets overconfident and actually puts himself in danger... if anything can pose a danger after the training he got.