There is only one way for it: learn article with the noun. Not Tür, but die Tür, as if they were one word. But of course there are some rules for some words. Such as All the words with suffix -ung takes feminin article die. You can find these rules in any grammar book. But for the others, you should learn words with article.

Learn the Artikel together with noun. Don't learn "Tisch", learn "der Tisch". There's no way around that, you have do to that in any language where nouns have gender. In the same way, don't learn single verbs, learn the complete expression: Not "geben" but "jemandem (Dat) etwas (Akk) geben".

thanks guys for help :)

As for myself, I only remember 'he, she, it' or 'er, sie, es' to refer to any noun. Just think it like how we remember the pronoun in Arabic. Practise the cases step by step. German and Arabic both have cases, right? Make sure to get used to one case before moving to the next one. We should not learn all at once.