if you wanna go to usyd then don't let the fomo stop you
in my close friend group I was the only one who went to usyd and I hated all of 1st year because I missed them + couldn't make friends, but then things fell into place and I've had no issues making friends people are nice wherever you go, plus I still see my hs friends all the time I was just being dramatic in 1st year (covid did ruin things though)
I personally love unsw's campus it's colourful and cosy, usyd is pretty but doesn't feel alive sometimes I reckon it's the vastness and the lack of greenery