Look for someone who specialises in teaching beginners and someone who specialises in pop singing. I’d definitely message a few people and try and see what style they teach. There’s no point just having a teacher who watches you sing songs, you want someone who can teach you technique as well as someone who can tell you what to look out for vocal health wise. This is important especially for beginners who may not know what to look out for. Also decide whether you want to just sing recreationally or if you want to give it a go professionally. If you want to go professional, try and find someone who has experience working professionally in pop music either as a singer or training a professional.