If you can find someone who can scaffold you through oral drilling of very simple sentences to slightly more complex structures ... varying the verb and then the subject and then some noun later in the sentence and then switch from a statement to a yes / no question and then back to the statement, and then make it into a WH question, and then back to the statement (say it again, say it again, one more time, one more time) ... this works very well.
It's most satisfying and effective if your interlocutor insists on accuracy of every phoneme (e.g. final s, third person s, articles, every syllable of every word) because this is an exercise in accuracy. If your interlocutor can get the timing right in knowing when to level up the sentence (and how, and where) and then dial it back down ... this is a very enjoyable oral fluency exercise. You don't do it for an hour -- you do it for 3 minutes here and then a few minutes later in a conversation.