... sorry to bust your bubbles here, but ...
"I am planning to do freelancing in 'Wrench.'"
"I think that I have a bright and illustrious career because(!) (tah-DAAH!!)
I know how to use a wrench
I could drag this thing out for many boring paragraphs, of course, but I think that this alone is plenty enough to prove my point, and maybe to save you a whole lot of embarrassment.
Have you ever
been faced with a plumbing fitting that broke-off in your hand, such that you had utterly no choice but to hire "a plumber?" Okay, whether or not you did or didn't, you certainly know that you did not hire that person because he or she "knew how to use a wrench." You hired him or her be-cause
that damn fitting broke off in your hand
and therefore you can't turn the water back on in your house until someone who actually knows what he or she is doing can save your !!
Who? Me? How
did you guess?!
Fifteen(!) minutes later, the fellow I in-desperation grabbed out of a telephone directory had completely fixed my problem, had matter-of-factly dressed down his assistant at the mere suggestion
that it might be necessary to "see if" his work would or would not leak, and had squirreled up into the attic to see if there were any other problems with the plumbing (there weren't ...) ...
... and had given me a generous stack of his business-cards, of which I very-quickly handed out every single one but one
If that man had told me that I should hire him "because he knew how to use A Wrench," I would not have given him the time o' day ... nor would you. I hired him because I had a problem that I could not solve. He could, and he did, and he mastered the business of
plumbing so thoroughly that, twenty-five years later(!), I am still telling his tale.
Go and do likewise. (Otherwise, "go get a job, instead.")