Listen to books
One has hours to listen, re-listen if one wishes, repeat phrases and inflexions, learn better pronunciation.
At the same time, have fun.
Perhaps, because the first book (7 and half hours long) I listened to was wonderful. I already ordered two more from Amazon and some others from the Home Lending library for elders. I am looking now also on some cheap second hand Audiobooks, that I hope, will help me to learn also speak better, not only understand.
I am also convinced, every one can learn from them how to change voice in different cases and occastions.