You want to get started from the very beginning and learn the alphabet first. You do not know any English words.
You have basic school-level knowledge. You know the alphabet, can read separate words and simple phrases. You know words like "boy", "toy", "she" and "he".
You know some grammar rules, understand the difference between Present Simple and Present Perfect. You can 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 English quite fluently and correctly, your vocabulary is good, but you lack practice and knowledge to express more complex ideas.
You have great knowledge! You need to maintain your level. Practise to keep up with all the nuances and subtleties of the language.