Praise be to Allah.
Yes, there is a very important starting-point, which is to pronounce the Shahaadatayn (Declaration of Faith). This is the only answer to your question. (For more details please see the questions and answers under the heading: ‘Aqeedah (basic tenets of faith) – important matters for those who wish to enter Islam.
We extend the warmest of welcomes to you, and offer our congratulations for the new direction you are about to take. May Allaah protect you from all evil.