The Online shopping [letters for the English practice]

Darling Hedwig,
How are you? I hope that you are fine well.
I have not heard from you for ages! 

I am so glad to have received your letter and know that you have obtained the welcome bicycle by means of the Internet the bicycle you ordered online! You had to expect wait for ("expect" means "waiting for" only with pregnancy) so long. My congratulations! You have asked me whether my family has much experience of with online shopping. Frankly speaking, we all - I, my sister, mother and father - did not use to exploit use ("exploit" implies taking advantage of) the Internet for buying something things. Nevertheless, now and then my mother and sister order a number of books in online stores. Therefore, we are sufficiently proficient comfortable with online shopping users. ("proficient" implies that online shopping is a specialized skill. Also, "online shopper"; "shopping" is the action itself.)

Besides, my personal latest bargain was also a book too (This sentence is grammatically ok, but "besides" in this sense really means "apart from what I was just saying," which is unclear since you are still talking about books. Instead, I would say, "Additionally," or "Speaking of books," etc.). I have bought the novel "Three Comrades" by Erich Maria Remarque in German. I am content, because this book is magnificent in all respects ("magnificent in all respects" sounds a little silly in a letter like this because it's so formal - totally okay if silly is what you want!): I have received what was promised to me. (I think I understand what you mean, but "I have received what was promised to me" is very vague and unclear: I would say instead: "It was all I hoped it would be" or "It was as good as promised.")

You have also asked me to say what I think about commercial advertising. Hard to tell unequivocally, because I guess that the aforementioned has a large number of advantages and disadvantages in equal measure (This sentence is technically correct, but is very difficult to understand. Instead, I would say, "It is hard to say, because I guess it has an equal number of advantages and disadvantages"-- the unequivocal nature of your opinion is implied by "hard to say," and since you just said the subject a sentence ago, you don't need "aforementioned" because the subject is still clearly commercial advertising). Given this, I remain at the neutral side: no priority and no denial.  (This doesn't make sense at all; what are you trying to say here?)

I am waiting await for your answer!
Best regards,
Genrietta

Your vocabulary is impressive, but I would recommend spending more time on expressing ideas clearly. Let me know if you have any questions!

:) devan