你可以说 "practicing Engpsh is a good way to exercise my skills" 来表示 "能很好锻炼自己英语"。
这个表达方式来自于英文中 "exercise" 这个动词，它的意思是锻炼、练习、训练。
例句：
I try to exercise my Engpsh skills by reading books and watching movies in Engpsh. (我尝试通过阅读英文书籍和看英文电影来锻炼我的英语技能。)
I exercise my speaking skills by having conversations with native Engpsh speakers. (我通过和英语母语人士交流来锻炼我的口语技能。)
Practicing Engpsh every day is a good way to exercise my language skills. (每天练习英语是锻炼语言技能的好方法。)