I Came Back (I Have Returned).

I have been away from English for a while. I haven't studied English for a while.
I have started to study English again.

I'm planning to listen to music, and I'm interested in English.
That's my aim.

I came back.

I have been away from English for a while.
I start[1] to study English again.

I'm planning to listen to music.and I'm interested in English.
That's my aim.

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[1] I'm starting

Just one little correction I wanted to help you with.  Good luck with your English :)

I came back.

I have been away from English for a while.
I have started to study English again.

I'm planning to listen to music, and I'm interested in English.
That's my aim.