You want to get started from the very beginning – the alphabet. You do not know any English words.

You have basic school-level knowledge: you know the alphabet, you can read separate words and simple phrases. You know words like "boy", "toy", "she" and "he".

You know some grammar rules, and you can tell the difference between Present Simple and Present Perfect. You watch movies in English with subtitles. You know words like "stair" and "fair", and you can tell the difference between "lie" and "lay".

You speak quite fluent and correct English, your vocabulary is good, but you lack practice and knowledge to express more complex ideas.

You have great knowledge, but you need to practise to maintain your level and to keep up with all the nuances and subtleties of the language.