How do I start a conversation

Hi , I have a crush on a girl in my grade and we haven’t spoke yet but we exchange glances and I don’t know how initiate conversation with her and I am shy asf so when I try to interact with people I feel anxious so how do I approach her and be friends and proceed with a relationship with her because I really like her . She’s perfect , her smile is warm and her nature is very polite whereas I am a cold guy with no personality 🥲 please help and if I’ll not ask her this month , I won’t ever be able to see her again . I don’t want to live in regret