In case you missed it,
climbing-zh@googlegroups.com is active, someone goes to Schlieren most Thursdays. They are mostly English-speaking expats.
I go to Milandia a couple of times every week, mostly with the English-speaking local climbers. I don't mind having an extra person till you find regular partners of your own, but sorry, 75-80 kgs is about the limit of what i can handle safely.
p.s. if you are dying to climb (like I was last year when I started

), both places have a reasonable number of routes that you can auto-belay (simpler and safer than a human belayer!), so you don't have to wait till you find your dream partner
Happy climbing,
N