Topic: How to become good tester

What do you mean by "good testing results"? Also, is your topic title another question for which you seek answers?
"How to become good tester" If the latter is a question for which you seek guidance, post that separately in the General Discussion forum.

Regarding "good testing results" at the current level of detail provided by you...

Good results are a product of efforts throughout the software development life-cycle. Good results are a result of the efforts of many:
System Specifiers, System Architects, System Designers, Capacity Planners, DBAs, Developers, and so on.

LoadRunner is but one of many tools used in certain ways to determine how robust those efforts were.