Introduction in Cantonese
你好我叫miki好開心認識你. (correct)
我係(一名)(you should have preposition here)獸醫.
上年我畢業做.
我喜愛動物而(‘而’means ‘and’ ,so you should use "所以”)我有兩隻貓.
我嘅興趣係針織
而(the same as bofore)縫紉.
我中意電子游戲而見電視放鬆. 我彈奏小提琴而彈奏交響樂團.
我係英國人,(从)London 黎.
我同我未婚夫一齊住.(correct)
我學廣東話因為我想去香港.(correct)
我爸爸有時會去香港返工因此我去做一曾經.
我想見面人而做朋友.(sorry I can't understand what you said here but the grammar is right)