However, these material (methods) did not seem to be useful uselessly. 

(However, these material seem to be useless.)

(However, this method seemed to be useless.)

How to do that?

I am a computer programer.
I am learning English again, because my work needs to use  requires English often. 
I say "again" , because I always can't adhere to (stick to) a routine of learning English.
During the past few years, I often read some English technical articles, listened to English music and watched English movies in English.
However, these material (methods) did seem to be useful uselessly. Recently, i want I decided to be a freelancer (freelance programmer).
I find freelance work online. Mostly all of good projects are foreign. (Most of the good projects are foreign.)
I must communicate with my clients who speak english. (I must communicate with my English-speaking clients.)
I can read mostly technical articles, but I'm not good at writing and communicating online.

please help me! I can help you to learn Chinese. Thank you!