People here are baptized early on too. I have a good friend who didn’t get baptized for similar reasons like you. Her parents left it to her to decide when, in which church and if she wants to be baptized, because she’s from mixed marriage (Lutheran/Orthodox, same as me). I do not wear a cross, but there significant amount of people in Serbia that do.
it’s usually something like this

I wore one when I was like 9-10, my maternal grandmother bought a blessed wooden cross (same shape as one in the picture) in a semi-famous Serbian orthodox monastery for me and I was a strong believer at the time, but I was raised as a Lutheran, not an Orthodox, so I didn’t normally wore anything like that.