Sure, Hurmat, I will help you find the best online resources while you live in Spain. It is more than easy, straightforward, and less tiring than you think, being a non-English speaker.
You said that you understand English because you contact English clients often; in that case, learning and improving English will be much easier for you than for others.
Firstly, let me tell you that there are many online resources for learning English. These include BBC Learning English, Duolingo, TED Talks, the British Council, and many more.
In addition, you can participate in English language courses that Coursera hosts. The benefit is that you learn with interactive lessons, video content, vocabulary insights, and podcasts. Coming to the online resources, here are the brief insights you must know:
BBC Learning English
An online resource that provides you with free English learning content is none other than BBC Learning English. It includes videos, several grammar-solving exercises, audio lessons, and news reports to take your English learning game to the next level. The benefit is that it is free to users.
Duolingo
Using Duolingo is nothing but a fun way to learn the language. It is like a user-friendly gamified version of the app that helps you learn basic English grammar and vocabulary.
TED Talks
You are often concerned about what comes next when learning the English Language. TED Talks is what comes to the rescue in such scenarios. It allows you to expose yourself to native speakers, enhance your vocabulary, and discuss topics in a common language.
British Council
The British Council is a user-friendly and efficient online resource for learning structured English. It means participating in English courses and tests and knowing your scores. Furthermore, it provides various vocabulary-building tools to help develop a cluster of same-meaning words for best-fitting situations.
VOA Learning English
This online English learning resource effectively engages learners with news articles and broadcasts and helps them improve.
While you research what online resource best suits you, you can also ask me about your question. I wish you good luck in learning a language that will help you thrive in your work.