我自己写的短文.给我找错误

My hobby is collect--(collecting) stamp--(stamps).My father collects stamp--(stamps) too.l've been collecting--(I've collected) stamps for five years.l have about 20 stamps.l think collecting stamp--（stamps) it's --（is)very interesting.l have many country stamp.--(I have many stamps from different countries).They're very beautiful.l like collecting stamp.
1）一句用“collecting stamps”的动宾结构来做宾语,而不能用动词“collect”.
2）邮票最好用复数来表达更好点.
3） 要表达集邮已经5年,由于“collect”是及物动词,用“I've collected”就可以表达了.
4)“collecting stamps”是主语,后面用“is”当谓语不能用“it's”.
5）“l have many country stamp”这句这样表达可能产生歧义,到底是“有许多国家”还是“有许多邮票”?所以可能我那样修改会好点.
6）这个短文写得还可以,继续努力啊.