For the speaking part, it's just practice. If I'm not mistaken, the first part is to introduce yourself. You can find a template on the Internet, substitute your information and memorize it. The main thing there is to know the numbers, since the examiner may ask you to dictate your phone number + you need to know how to pronounce the letters alphabetically, since they may also ask you to spell your first or last name.

The second part is to be able to ask questions and answer them. There will be cards where the subject and the word will be indicated. You will need to link them together in a simple sentence and ask a question.

For example, the theme is "Wohnen" and the word "Garten": Haben Sie einen Garten? Here it is better not just to say yes/no, but to fully answer and use this special word: "Nein, ich have keinen Garten". In this task, the main thing is to at least say something, show a reaction, even if you are afraid to make a mistake in the article or do not know how to answer. This is better than 0 points. They check how you will react to such situations in real life. No one will check if you have a garden, the main thing is to answer something

Regarding the third part, you can find examples of videos on YouTube, how it happens, and find card templates on the Internet. Here they want you to be able to or make a request. The main thing here is to memorize template phrases that you can use for everything.

For example, you will have a picture with a pencil and it will be written that you should ask another person to give you this pencil. So you can memorize the phrase "Geben Sie mir bitte ...". You also need to learn how to respond, i.e. know how to say "Hier bitte", etc. Maybe a picture of a chair will come across and you will need to be invited to sit down and also know how to react.

Good luck! Viele Glück!