There is a common belief that language learning becomes impossible with age due to brain plasticity decreasing in the later years. In other words, adults learn slower.
However, if you look further into the subject you will find yourself pleasantly surprised.
Adult learners have strong advantages over children that put them in an excellent position to speak another language
Advantage: You already speak one language fluently
Firstly, you already speak your mother tongue well in comparison to a child. In your adult life, you have encountered complex texts and have had to express yourself to a much higher standard. You have a better understanding of reading, speaking and understanding. This would serve as a foundation on which you can compare a foreign language to. When you learn a new word you would already know the English equivalent and when and where to use it. This prior knowledge means you are building your language rather than a first-time discovery.