You will not always have someone to talk to. You will always have your own day. Narrating it out loud sounds ridiculous for about two days and then becomes the most frequent speaking practice you have.
It uses the vocabulary of your actual life
Textbooks teach you the train station and the restaurant. Your life is the kettle, the charger, the thing you forgot to buy. Narrating exposes exactly which everyday words you are missing — and those are the ones you will need first. Keep a note of what you could not say. Three lookups a day from that list is worth more than any pre-made vocabulary set.
It removes the audience
Most speaking anxiety comes from being watched. Alone in a kitchen there is no one to judge a broken sentence, so you finish sentences you would abandon in company. That habit of finishing transfers. The sentence you completed alone on Tuesday is the one that comes out intact on Friday.
Start with what is in front of you and use the present tense only. The goal is fluency of delivery, not grammatical range – that comes later and comes easier once your mouth is used to moving.