How can I build friendships with Muslim people? (I’m not Muslim)

Assalamu alaikum! I’m not Muslim, but I’d love to connect with Muslims and learn how to be a good friend. I’ve had some past experiences-I visited mosques during Ramadan, lived with a Muslim couple as a tenant, and became close to a sister. We developed feelings, but her family didn’t want her befriending a man outside the faith, so we kept it private. Eventually, it didn’t last, and she married a Muslim man, which I respect. That was years ago. Recently, at a public library with a small art gallery, I met four ladies in full-length robes and hijabs (I’m still learning the terms). They were taking photos, and when I looked over, the photographer noticed. I kept to myself, walked around, then later approached and offered to take their photos with their phone. They were all smiles, though maybe that’s just their kind nature, not necessarily excitement to see me. One offered to take my photo, but I declined since I’m camera-shy. I left to study. This made me realize I’ve been closing myself off too much. I want to open up and form genuine friendships with Muslim brothers and sisters. Any advice on how to approach this respectfully, keeping Islamic values in mind? JazakAllah khair!