Best reply tips

I (27 M) wanna start a conversation with a girl (prolly 25-26F) … have recently been added with her on Instagram She posted a great picture on her Story… Now i want to do two things 1. Wanna send a cute/engaging reply to her story complementing her (ofcourse i dont want to be a creep here… some sensible text complimenting her would do the job) 2. Wanna start a conversation with her over Instagram… What reply should i do in both of these cases… !