The icon looks like a black square with a white music note on it. You can find it on your Apps menu. This button will open your profile page. This button shows the total number of people you're following at the top of your profile. It will open a list of all the people you follow. Alternatively, you can tap Fans next to Following to see a list of users who follow you. Find the user you want to chat with, and tap their name on the list to open their profile. You can find this button below this user's picture at the top of their profile. It will open the message screen. Tap the text field at the bottom of the message screen, and type your message here. You'll find this button next to the text field on the right-hand side. It will send your message.

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Write a summary of the previous text in Indonesian:
Jalankan TikTok di perangkat Android. Sentuh ikon yang terdapat di kanan bawah layar. Sentuh Following di bawah foto profil Anda. Sentuh pengguna yang ingin dikirimi pesan. Sentuh tombol Message di profilnya. Masukkan pesan di kolom teks. Sentuh ikon pesawat kertas berwarna merah.