Many students are afraid to speak German simply because they think they will look silly if they make mistakes when expressing themselves.
However, this can be overcome if you remember the following:
1. During a conversation, don't think about grammar and rules, but about the content of the conversation.
2. If during a conversation you can't think of a certain word, use the so-called compensatory strategy — description of the situation, gestures, facial expressions.
3. When having a conversation, use short sentences. When using complex structures, you will need to concentrate on grammar.
4. Avoid translating literally from your native language.
5. Speak loudly and clearly enough. Don't be afraid of your accent. What matters is that the person you're talking to understands you.