It feels less weird the further along you get lol For me, I felt really odd at first! But after I really started feeling and seeing his movements it felt more natural. I'm sure there are benefits to it but I don't think there's anything negative if you don't. Your baby hears you all the time anyway :).
Ftm and I'm 23 weeks I try to talk, read to my baby but find it weird so I just talk to her every once in a while
It depends on if you are the kind of person who would usually talk, read or sing to your baby in the womb. If you would 'of course' do that and this pregnancy you are not, it might mean doubts or constraint. But if you are not the kind of person who would do that no matter how happy you are to be pregnant, it probably doesn't mean anything. Not everyone talks to their baby or reads to their baby or sings to their baby when pregnant.