Don't worry !
I want to learn assembler, in order to understand how the machine works, then indeed, to make a little C stuff ! it's the main goal.

I know and think that 80% of programmers today don't think about optimisating their code. I'm one of them in PHP.
So before reading a book that mentioned "garbage collector", i didn't had any idea about flushing caches for example.

I'm just, again, looking for a guide af ARM assembler, with exercices for example, that i could do on my n810.

Because i think that it will be obsolete in 4 years, and that a 1998's powerbook g3 laptop isn't yet, thanks to linux.

So why not learn java indeed. But in this order :
ASM => C => Perl => java => UML 2 => XML => PHP5

C++ will be necessary to understand linux code. Not to create, but to understand in debug.
Learning these languages will make me code in different manners. And optimize algorithms.

I ordered a book to learn object oriented programmation.