What the best way to confess feeling toward shy girl for the first time?

Help me please!!!
-Is it good we confess on first meeting/introduction to her? But we look at each other a lot. But never had convo.
-Shy girls, how the way you like when your crush confess his feeling?
-Guys, any experience?
-Do I compliment her first before I start our first convo?

What the best way to confess feeling toward shy girl for the first time?
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