Here are some tips that could help you:
Muscular memory is a concept that explains the use of your mouth, tongue and parts of your brain when you speak a language. So, every language you know is like a muscle you train. If you’re learning and using Spanish as a second language, this muscle starts off small. To make it grow, you need to exercise it. Some exercises will feel more natural for you because of your personality. However, the more diverse your training is, the more effective your progress will be.
How could you start to exercise your Spanish muscle?
Your native language is stronger because you’ve exercised it for much more time.
If you’re not living in a Spanish speaker country:
Listen to songs in Spanish: We recommend Juanes, Jarabe de palo.
Watch movies with subtitles: Read the subtitles in some parts of the movie with a partner or alone to follow the rhythm and be more conscious of the sounds and speed. Practice with the parts you like the most.
Try active listening: Read subtitles or transcripts at the same speed as the audio goes. Read the text aloud.
You’re living in a Spanish speaker country:
Learn to listen to people: Ask people to read for you and observe the movements and positions of their mouths while they do it. For example, in a restaurant, ask the waitress to read the menu for you.
Notice that people read groups of words with a special rhythm: Imitate that.
Identify structures in their speaking and reuse them: For example: Ayer/fui/ a la piscina. (Time/indefinite past/place). Now create a sentence using this structure.