could help me learn assembly language

[kcire_eae]

I was looking for and i found a course "cracking from 0" of ricardo narvaja is in spanish,but there a version in english (translated with translator),but well explained.
for start from 0 i think that is the best way There are basic concepts of assembly so like of ollydbg.
I was reading but i had to stop reading because i don't understand the negative hexadecimal,so if somebody know some way easy to understand I would appreciate if you can post here.

for those interested.
here is the tutorial, just select "IN WITH ENGLISH TRANSLATION".

http://ricardonarvaja.info/WEB/INTRODUCCION%20AL%20CRACKING%20CON%20OLLYDBG%20DESDE%20CERO/