and then, after that

I finish my homework.

私は宿題を終えます

I finish my homework first.

私は先に宿題を終えます

I finish my homework first on my own.

私は一人で先に宿題を終えます

I finish my homework first on my own at home.

私は家で一人で先に宿題を終えます

I finish my homework first on my own at home in the evening.

私は夕方家で一人で先に宿題を終えます