Here is a common question about learning Spanish...
Hi, what is the hardest part of learning Spanish? ( or parts) Thanks
4 Answers
I'd say the three hardest things to master are ...
Ser vs estar
The Preterite vs imperfect past tenses
And da-da-da the subjunctive
This question could only be the object of much subjectivity, among which you'll find certain aspects that are harder to grasp for a greater number of people, but not necessarily for others.
Anyway, non-native Spanish learners will surely have a better ground to stand for talking about the difficult parts of the language.
The verbs.
It will depend on your native language, which I presume is Farsi. It uses the same letters as English plus: á é í ó ú ñ and ü which are really necessary to learn as part of the spelling. The letter K is not used except in foreign words. The English digraphs th, and sh are not used.
If Farsi has complicated verb structure you may find Spanish easy. Spanish verbs are far more complicated than English verbs. English and Spanish share a few words through the common relation with Latin.
Try immersion, that is, learn phrases to use in various situations and also listen to native Spanish speakers and speak to them as much as you can.