Do not be afraid to make mistakes
Your goal is to convey the message, not to speak English fluently with the correct grammar and vocabulary.
Practice, Practice, Practice
Practice makes perfect. Always look for opportunities to test your spoken English. For example, the conversation feature provides an easy way to speak English and get feedback from native speakers around the world.
The more you hear, the easier it will be to speak English. You will begin to speak more fluently and confidently in conversation, learning how to comment in English with expression.
Congratulations on success
Every time you talk to someone in English is an achievement. Every single communication you have, no matter how small, will help you improve your skills over time. Be proud of your progress.
Think in English
From good English speaking to great English thinking. At first you will find it difficult, but after some time you will learn to switch between speaking English and your first language.
Talk to yourself
Talk to yourself in English in front of a mirror for a few minutes a day, you will learn how to use different expressions, you will also learn where you make the most mistakes.
For my experiences:
When I was in high school, I used to be a shy person when it came to English class because we our a rule in our class. If you want to talk to your classmate, you have to talk in English. That is my weakness. I was a quiet person in English class because I was not confident to speak English. Until one day, I decided to learn to speak because all my friend support me to learn and speak in English class.
First: I made a lot of mistake when I spoke English but I was not ashamed of myself. I will be ashamed of myself if you could not speak with my friend in English class.\
Second: I always practice with my friend and everyone around me and I also grown confident everyday.
Third: Sometimes I listen to English song and learn a lot of word of it. It was very helpful for me as a student who want to learn English. If I was wrong, I always listen to someone to correct me and try to improved it everyday.
Fourth: When I try to speak a local language, I always think it in English after I spoke my language so that I also improved my speed of speaking English too.
Fifth: I often talk to myself at night in English to improved speaking skill until I feel asleep.