"Ignore any postings that tell you to get your CFI and build some hours"
Ignore anyone who tells you to ignore the vast majority of folks who are going to tell you to get more experience first.
Personally, I don't think you're qualified to be a pax jet F/O at those times. But I don't do the hiring, the airlines do, so it's sort of a moot point.
If the airlines think you're ready, they will offer you the job. If you get through training, you'll be good enough, as far as management is concerned.
There are many at this board who aren't happy with how low the experience levels to be an airline pilot have gone. Don't take it personal.