“If I told the secular ppl I work with that I try to not type on CHM, then got a psak from my Rav that I can, should I do it or not, should I bother to explain it or just let them assume I’m less strict than I used to be?”
I assume you can just explain to them that you misunderstood the halacha.
“Is it ok to type something if I know my secular coworker will probably print it out for themselves?”
As far as I understand it, there is no issue at all of typing. It is specifically writing that we don’t do. I don’t think that printing would even fall under the category of writing and if anything it would be no worse (probably better) than writing with a shinuy