There are two parts to fluency: knowing the language and knowing how to produce the language.
Being fluent means that you can use the English language comfortably. You can communicate freely and you can have conversations with native speakers without having to constantly look for help.
Fluency can also be seen in how you speak. You can know plenty of English vocabulary, but if you have to pause or repeat a lot when speaking, your fluency might not be so obvious to someone. If you speak very slowly or in a very flat, unemotional manner, then you won’t sound very fluent, either.
On the other hand, sounding fluent doesn’t mean you actually are speaking good English.
To be fluent in English, you need to master both the language and how you speak it.
Make sure to attend the class, irrespective of your age and profession. This class will surely help you.