How can I improve at support?

Hello LoL community! Recently I've been trying to widen my knowledge and skill throughout different roles, but I've always seemed to struggle to play support. I feel like whenever I play support, I have a lack of gold and experience, making me useless to the team and unable to affect anything. How do I stay ahead, and how do I become useful to my team? Any feedback is useful, I just want to hear what people think. Thanks!
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