ligar con = flirt with
ligarse a = closer to linking up with them successfully after the flirt, implying probably that you secured them for the night, maybe hooked up
https://www.tiktok.com/t/ZTDXep1Gv/
https://www.tiktok.com/t/ZTDXeTenq/
https://www.tiktok.com/t/ZTDXev2RX/
ligarse con = hook up (with)
“O sea, vas a ligar al antro, güey” reel
“…qué vas a hacer para ligar no le vas a gustar a ningún hombre con los pelos de las piernas” video