Why am I so bad at talking to girls?

so the thing is if i talk with a guy most of the times we share at least one interest and a conversation builds up naturally. but if i start with girls it kinda always follows this formula:
we intruduce ourselfes then basic samll talk like how u doin, where u from etc u get it but after this smalltalk i end up asking about hobbys and intrests nooow it most of the times gets awkward because none of them match i most of the time just fail to keep the conversation alive so what can i do about this?
Why am I so bad at talking to girls?
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