When I was fifteen, I fell in love with British English and I hadso I started to listen to The Beatles, Queen, Ed Sheeran and David Bowie to try to imitate their accent.

This correction sounds a little more natural in the US.

いい味ですよ！

My favorite songs at that time was: ere "Oh, Darling" by The Beatles, "Thinking Outl Loud" by Ed Sheeran, "Heroes" by David Bowie and "Somebody to Love" by Queen.

We use quotation marks to punctuate songs. The mnemonic for when to use quotation marks is PASS which stands for Poetry, Articles, Songs and Short Stories.

この曲も好きです。^^

Now that I'm older, and my English is more advanced than before, I'm more immersed in British and American culture, so I listen to a lot of English-speaking artists.

We don't consider Americans English (イギリス人) so I modified it to "English-speaking." (I think the British would definitely hate it if people considered us Americans English.)

Right now my favorite songs in English are: "A lLine without a hHook" by Ricky Montgomery, "Make You Mine" by Public, "Butter" by BTS (they are a Koreans band, however a lot of their songs are in English) and "Perfect" by Ed sSheeran.

or if you want to use the colon:

Right now my favorite songs in English are the following: "A Line without a Hook" by Ricky Montgomery, "Make You Mine" by Public, "Butter" by BTS (they are a Korean band, however a lot of their songs are in English) and "Perfect" by Ed Sheeran.

I don't know these songs so thank you for the recommendations!

My favorite songs in Japanese are: M "me Mme Sshe" and "Iron Feather" by Radwimps, "One mMore tTime, oOne mMore cChance" by Masayoshi Yamazaki, "Sukidakara" by Yuika and the classic "First lLove" by Hikaru Utada.

With the colon:

My favorite songs in Japanese are the following: "me me she" and "Iron Feather" by Radwimps, "One More Time, One More Chance" by Masayoshi Yamazaki, "Sukidakara" by Yuika and the classic "First Love" by Hikaru Utada.

Since Radwimps spells "me me she" this way, we keep the punctuation by the artist.

この曲も全部でいいですよね。

My favorite songs at that time wasere: Oh Darling by The Beatles, Thinking Outl Loud by Ed Sheeran, Heroes by David Bowie and Somebody to Love by Queen.

Right now my favorite songs in English are: A lLine wWithout a hHook by Ricky Montgomery, Make You Mine by Public, Butter by BTS (they are Koreans however a lot of their songs are in English) and Perfect by Ed sSheeran.

My favorite songs at that time wasere: "Oh Darling" by The Beatles, "Thinking Outloud" by Ed Sheeran, "Heroes" by David Bowie and "Somebody to Love" by Queen.

Now that I'm older, and my English is more advanced than before, I'm more immersed in British and American culture, so I listen to a lot of English artists.

Right now my favorite songs in English are: "A lLine wWithout a hHook" by Ricky Montgomery, "Make You Mine" by Public, "Butter" by BTS (they are Koreans; however, a lot of their songs are in English) and "Perfect" by Ed sSheeran.

My favorite songs in Japanese are: "Me Me She" and "Iron Feather" by Radwimps, "One mMore tTime, oOne mMore cChance" by Masayoshi Yamazaki, "Sukidakara" by Yuika and the classic "First love" by Hikaru Utada.

My favorite songs at that time wasere: “Oh Darling” by The Beatles, “Thinking Outl Loud” by Ed Sheeran, “Heroes” by David Bowie, and “Somebody to Love” by Queen.

Use quotation marks for song titles. Also you don’t necessarily need an extra comma after David Bowie, but it makes it more clear

Right now my favorite songs in English are: “A line without a hook” by Ricky Montgomery, “Make You Mine” by Public, “Butter” by BTS (they are Koreans however a lot of their songs are in English), and “Perfect” by Ed sSheeran.

My favorite songs in Japanese are: “Me Me She and Iron Feather” by Radwimps, “One more time, one more chance” by Masayoshi Yamazaki, “Sukidakara” by Yuika, and the classic “First love” by Hikaru Utada.