The qualifier is running for everyone... existing GTP members and new GTP members... details here... https://www.gtplanet.net/gtplanet-wrs-qualifier-now-open-for-gt5/
Yes, you need to create a new PSN account, and yes, you'll need to do a little work on that new account to level it up and unlock a few tracks. But that's relatively easy using the seasonal events.
Once you've done this you can easily gift cars across to your GTP account.
Times are a secret as it's important that all competitors are treated equally and do not gain unfair advantage by having a target time.
Ultimately it doesn't matter how fast you are as long as you're in a division you can compete in... when/if you then improve your pace (and lots of GTP people have improved massively through the WRS) you can get promoted to a higher division.
But what I will say is that in my experience, based on the past 3 years of being a member here, if you put the effort in to making new friends and getting involved in the WRS/on-line racing crowd you will get a massive pay back in the quality of racing and people you'll mix with in GT5.
Thanks for the info. I'll give this a try and hoefully as you say will be doing some good online racing in no time.