Extremely soft leather

[Xig]

Why my leather is so soft But the leather I see in the tutorial videos is not like that? 
My leather is so soft that its edges cannot be rounded with a beveler.

[DJole]

Hi Xig, and welcome to the forum!
 

The leather in many tutorial videos, which can be beveled and tooled, is called "vegetable tan leather" or "tooling leather."
Your soft leather is probably garment leather (like cloth) or "chrome tan leather," neither of which is meant to be tooled or beveled. 

[rleather]

It also might be a milled veg tan that is soft, which can be tooled , it can also be beveled and burnished. Pictures might help us to help you.