Same situation but I just recently converted. Didn't change my name as it is allowable. Planning on getting married next year. Haven't tell that to my parents but I suspect my dad ardy found out about it. This kind of thing takes time to accept.  I'm planning to tell my parents about it next year and I'm ardy expecting the worst scenario where I might be abandoned but I don't think it will last long. I have 2 points that might makes my parents easier to accept me,  first I didn't change my name and my future children are still gonna have Chinese name and secondly I'm still allowed to perform family traditions like burn incense for the ancestor during cny but it is makruf which means allowable but not encouraged to do so.