I want to lmprove my vocabulary, could you kindly show me how did you improve yours,

You have to read a lot of books then write out the difficult or new words check out the meaning and use them in writings,also learn from music lyrics and movies,after writing the words,when you read what you've written its going to stick.infuse them in your speech

^^^^^^ to add to whats above try to peruse through words and statement made, seen or learnt in a bid to getting same meaning with different words, combination of other words

Lastly, don't be too pompous to ask a question for meaning of new vocabularies heard or learnt it will help you a great deal.

May God help you as you embark on this mission