You only need one of the two things to prove the existence of the creator of this Universe.
1. Common sense to study nature and deduce the results.
2. Read the Quran or the Bible if you are literate, open minded and willing to learn the truth.
Brother, the fact that you are asking this question, you already believe in the existence of God, it is just that little devil in the mind that creates a little doubt. That is how your faith is tested. Don't worry, if you continue to seek you will eventually find a convincing answer.