Pakistan benim ülkem.Bu güzel bir ulke.Benim Pakistan seviyorum. ( Pakistn is my country. this is a beautiful country.I love Pakistan). i wrote correct in turkish or not??

Jeeway Pakistan !!!  Brother country ! [Kardeş ülke ! ] 

still not good command on turkish

I think you done good. just a tiny marking was missing "ı" 

Pakistan´ı  seviyorum. 

Türkiye´yi  seviyorum.

Karaçi´yi seviyorum.

when you use the verb "sevmek" if you refer a definite thing , than attach one of these letters on to the object. " i,ı, u, ü " 

O  evi  seviyorum ===> I love [like] that house. 

It is a definite house and you put "i" on the object [ev] 

İstanbul´u   seviyorum ==> I love  Istanbul.

above, you put "u" because of  vowel harmony.

u------->  u 

suggest me either i should learn tenses after the completition of vowels harmony section or to start the lerning of day, time, date, months name etc. which one you will prefer.

Another thing, 

Benim  means  = mine [my one]

but you wanted to say "Ben -----> I  

Ben  Pakistan´ı  seviyorum.

I        love     Pakistan 

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And  when you put suffix after a proper name [Pakistan, Türkiye, Ankara..etc ]

we mark it with apostrophe.

Pakistan´ı

All right i got it. as we translate in english same as with turkish, but some how different.

I would say, learn ´days, times, months , seasons and simple conversations first" , 

secondly learn "possesives"  iyelik since possesives is the main column of Turkish language, if you dont know the possesives you cant progress.

possesives , for example =   Ali´s  pen = Ali´nin kalemi ,  My car´s  key ==> Arabamın anahtarı.....  

and then learn noun sentences 

noun sentences are the sentences without  verbs , such as ;

Ben avukatım ---> I am a lawyer.

Sen  ögrencisin.  ---> You are a student.

Sen  Pakistanlısın ---> You are Pakistanian.

etc..

and  after that  start learning  tenses. 

but meanwhile , learn as much words, verbs as you can. Make noun lists and verb lists and add 5 nouns 5 verbs a day. And study regularly..then you will make good progress i believe. 

Follow the lessons on this site..Start from beginners section. And ask anything that confuses you , on the forum. There are great teachers always available here.

Good luck with your learning . 

çok teŞükkür edirim. i will follow this as you told me the sequence. its quite simple and easy.