Salam sister.
Usually I would not really comment on such a thread and that too on a public forum but it seems you are someone who is genuinely perplexed and are probably seeking counseling regarding something that you see coming towards you.
Yes, in times of today the idea of arranged marriage seems a bit impractical because obviously there are a lot of unanswered questions attached to it. There are many "what ifs" in our heads and there is a long list of reservations. Marriage obviously is a step that opens the next chapter of our lives and that indeed is the most important chapter because it addresses one of the most important needs for us and that is the need for a companion.
Anyway, I'll quote an ayah from the Quran and then sum up my comment,
سورہ الروم آیت نمبر 21
وَ مِنۡ اٰیٰتِہٖۤ اَنۡ خَلَقَ لَکُمۡ مِّنۡ اَنۡفُسِکُمۡ اَزۡوَاجًا لِّتَسۡکُنُوۡۤا اِلَیۡہَا وَ جَعَلَ بَیۡنَکُمۡ مَّوَدَّۃً وَّ رَحۡمَۃً ؕ اِنَّ فِیۡ ذٰلِکَ لَاٰیٰتٍ لِّقَوۡمٍ یَّتَفَکَّرُوۡنَ ﴿۲۱﴾
ترجمہ:
اور اس کی ایک نشانی یہ ہے کہ اس نے تمہارے لیے تم میں سے بیویاں پیدا کیں، تاکہ تم ان کے پاس جاکر سکون حاصل کرو، اور تمہارے درمیان محبت اور رحمت کے جذبات رکھ دیے، (٨) یقینا اس میں ان لوگوں کے لیے بڑی نشانیاں ہیں جو غوروفکر سے کام لیتے ہیں۔
آسان ترجمۂ قرآن مفتی محمد تقی عثمانی
https://goo.gl/2ga2EU
30:21) And it is among His signs that He has created for you wives from among yourselves, so that you may find tranquility in them, and He has created love and kindness between you. Surely in this there are signs for a people who reflect.
— Mufti Taqi Usmani
In this particular verse of the Quran Allah says that it is one of His signs that He has created wives/spouses/mates from our own kind so that we may find muwadda (strong love and affection), sakoon (tranquility, relief, respect and reassurance) and rehmah (mercy and forgiveness) in them.
So clearly we can infer that love, tranquility, relief and forgiveness in a marriage comes from Allah SWT for our wives/spouses/mates. Now this is real love and understanding and so in order to have that for someone and vise versa, one must lawfully be married to that person or in other words one must be in a state of nikkah with that person. Because nikkah is the only lawful and legal relationship that can exist between a man and a woman who are not each other's mehram.
So if a man and woman come together in state of nikkah in name of Allah and for His sake then they should have firm believe also that Allah SWT will create love, tranquility, relief and forgiveness in their hearts for each other. Because Allah says it's one of His signs. This should make arranged marriage easy but the condition is to have firm faith and pure intentions of getting married only for the sake of Allah SWT.
I hope this reply is useful for you.