I am weak in English speaking. How can I enhance my communication skills?

A little training can speed up things. Fortunately, now-a days there are number of online courses which one can pursue in their free time. You can check the below mentioned link: https://www.wiziq.com/courses/search.aspx?qry=english. Good luck.

You should try to be a good listener first. Otherwise, your communication won't become successful. Try to speak your English a bit loudly. As English is your second language, you may have some problem of intelligibility. So, raise your voice a little. Get all your vowel sounds clear. Enunciate them

Join a good coaching institute to improve your english. Also, try to write few line in english, every day. You need to strengthen your vocabulary.