- youssef_ha3September 2019
Hm, that's a mighty BIG question, Youssef. The "best" answer to your question might be more easily considered if you included some notion of your English-knowledge "need(s)", e.g., for travel, education, employment (advancement), relocation to an English-speaking nation (watch out and keepyour head down if it's The US or UK), etc.
Focus on spelling. English isn't phonemic (words often don't sound how they are spelled), and writing with correct spelling will distinguish you as a good English speaker. In school in the USA, many English speakers can't even spell correctly. Your spelling is good, though! Also, learn punctuation. Spelling and punctuation are most important to appear fluent in written English. Word order is more open, but it will take time to learn all the different options for word order, so focus on SVO word order for now.
Buy some basic English lesson books for spelling, punctuation, and grammar. Grammar is really important to understand in English, because we don't have genders for nouns, and we only have three cases for words (eg: He, him, his). It's all about prepositions (from, for, with, to, about, by) in English.
If you asked me start with main grammars. Verb Be, tenses, and how to write a completed sentence by subject+verb+object. After that start by higher levels and write too much... I hope it was helpful.