With just T9 badge and crafted gear you can go straight into ICC so long as you have around 40K HP you will be fine and defense capped.
Watch u-tube and read up on the first 4 fights and try and get in as 2nd tank to an experienced tank.
On most servers first 4 pug runs are commonplace alot pushing to 6-10 now. Sunday night and monday night tend to be the best if you are starting out as it's desperado's time because reset is tuesday (hmm well at least for us Oceanics prob diff day for diff areas).
TBH the trash will be far more daunting to you than the first 4 bosses.
** Remember Warcraft players fail in directions you never thought possible.