So, tl;dr, I'm planning to change my first name and last name as soon as I'm 18

I'm currently in ukraine but planning to Not live here as soon as possible, but either way, my deadname is ukrainian and my actual name is english

so I tried to find out if there are any restrictions on name changes but the only information I could find was "dont do crimes or we will reject it" so I thought I'd ask here in case anyone could maybe know