You should learn to be more observational would be my advice. Notice what the hell is going on around you,and about her.
Notice tattoos?-"I like your tattoos,are those recent or something you got a while ago?". She answers your question,you can ask a followup,if she says it was one of her first you can ask if she regrets it,where she got it,talk about your tattoos etc.
Notice her body? You can ask if she works out,ask if she was a athlete,followup with if she likes sports etc.
She wears glasses?Ask if they are prescription,compliment her frames.
Notice she stays in her phone?ask if she is heavy into social media,whats her favorite platform,ask how many followers she has,plenty of questions to go along with this.
learn to listen and observe and stay out of your head. The more you do this,the more you will learn which questions are the best,that branch off easily into different convos that can keep the convo going for a long time.