Assalaam alaikum,
Regarding those who have passed away, the one thing we can do is make dua for them.
Regarding Quran;
“(This is) a Scripture that We have revealed unto thee, full of blessing, that they may ponder its revelations, and that men of understanding may reflect.” [Quran 38.29]
Reading the transliteration is a good thing as you will understand the meaning, especially if you do not know the meaning of the Quran verses in Arabic.
Muttaqun OnLine: The Noble Quran
Muhsin Khan translation is recommended for reference.
The benefits of reading the Quran is beneficial in both ways, in Arabic as well as a reliable transliteration.
It was narrated that 'Abd-Allaah ibn Mas'ood said: The Messenger of Allah (peace and blessings of Allah be upon him) said: “
Whoever reads a letter of the Book of Allah will be credited with a good deed, and a good deed gets a tenfold reward. I do not say that Alif-Laam-Meem is a letter, rather alif is a letter, laam is a letter and meem is a letter.” (Narrated by al-Tirmidhi, 2910)"
The rewards for reciting in Arabic are numerous and even if you cannot do it well at first, trying to learn will be rewarding as the more you struggle to be a better muslim, the more your rewards.
The Holy Qur'an - ?????? ??????
You could always refer to a site like this when reading translation so that you will hear the Arabic recitation as well. I find it easier to memorise while listening to a recitation and then repeating after it.
YouTube - Mishary Rashed Alafasy- Surat al Takwir - The Overthrowing
YouTube - Sura A'la (The Highest ) Mishary Rashed Alafasy
YouTube - Beatuful Recitation by Mishary Alafasi / alafasy - Sura Najm
.