Well, thanks about been honest for your level of education.
In order to get my degree as electrician I was forced to learn about meters and multimeters, because it is an full lesson by it self.
About the meters evaluations and qualifications, the true authority is the international test centers.
The Americans are trusting the UL , the Europeans the DVE & GS, and China never had any up to recently, which name it CCC.
Any meter with out any sort of international aproval (quality certification) is not worthy to be imported anywere, have this in mind too.
The simple optical inspection it can show only the 30% of the picture, have this in mind too.
Personly I spent money only if the picture is complete at 95%.
For 100% perfect creations I trust only God.
Regards.