I think you should try everything at least once. Dont let cost stop you from doing things save up for it and treat yourself... having said that here are some tips for your first time:

If you like sweet things then try the sweet and sour chicken or the chicken cashews... they are a favorites here for Jordanians. And I would recommend chicken dumplings, and the noodles instead of the rice...

Thoses are some choices I would recommend for first time chinese... and dont forget your fortune cookie at the end - at least at WOX you get one :)

Let me know if you like it :D