At the beginning of learning Japanese, first learn a few songs in Mandarin or Cantonese. Old songs are familiar in melody and easy to catchy. Introduce some slow songs and learn fast songs when you are familiar with them.

Teresa Teng-Okamachi ブルース (Who loves my Japanese version)

Teresa Teng-I only care about your Japanese version.

Teresa Teng-He Rijun Come Again (Japanese Version)

Qian Changfu-Northland Spring (Mandarin: Banyan Tree/Me and You)

Gu cun Xinzhi (すばゐ) (the original song of "Star")

Yuanzizi-Huayi 1st Road (Priscilla Chan? Piaoxue original song)

Nakajima みゆき -ルジユ (Faye Wong? A woman who is easily injured)

Hina Changji-Flower (original song of Emil Wakin Chau Flower Heart)

Hua (original song of Leslie Cheung's "Walking Together")

Atsumi Jufu-Dream Chasing Wine (Taiwanese: Huang Yiling dare not cry)

It's practice anyway. Just don't dislike old songs. These old singers sing clearly and easily, so as not to make mistakes.