Formal writing practice 1: A letter to help new undergraduate students
Dear website director,
The purpose of this email is providing to provide [/to share] my opinion about [/regarding*1] the advices which that should appear in the website that you manage, as it has been requested in response to the requests you made on the site[*2]. I would like to help in improving the available information for new students, since I have felt [/experienced] [", first hand," / ", personally,"] the confusion of being a new-year student and being absolutely lost about everything related with university life.
First of all, the importance of having achieved some skills before the university starts starting university is undeniable [huge / difficult to overstate*3]. Those Such skills include listening for some several hours without stopping paying attention [/losing focus], taking notes and summarizing them: sometimes even simultaneously. It may seem obvious that students at this level of education have those abilities, but some students reach the marks needed to enter the university just [by] learning subjects by heart.
*1: "Regarding" has a slightly more formal tone to it and I think it's very slightly more appropriate for letters / emails of this sort.
*2: I wasn't entirely sure of the situation this was in his response to, but I assume that you mean you're writing to him in response to his own requests for input into what advice he should offer.
*3: Various synonyms for 'big' will probably work here. In my eyes, "undeniable" seems a little out of place here, and maybe something like "insurmountable" would work well if you want to keep a similar sound to the sentence.
Apologies for only making it partway through, and hopefully overs will help to go over the rest and / or offer other approaches to the section I've already corrected.
I don't think there were any actual grammatical errors that needed correcting as far as I went, so what I did was mainly to smooth out some aspects of your phrasing, (e.g. using the infinitive "to provide" instead of the present participle, "providing"), or make the use of language a little more formal. Even some of my changes are likely to be disputed by other native speakers, which just goes to show how amazing your English really is! :)
