I was going to post a link to 'Turning Muslim in Texas' which I listened to years and years ago, and you just reminded me of it but not posted enough posts myself to have permission to post links, so just search for it on youtube.
At the end of the day, all new Muslims face this choice, either upset their family or keep displeasing Allaah. For some it's an easy choice because their family are more open and accepting, for some it's very hard, but we are only here for a temporary period of time in this life, so the decision should be easy when weighed up in that way.
If you actually feel you will face real persecution (not just them being upset and argumentative with you), then like many of the early Muslims you can keep your new faith a secret and practice as best you can until you can move somewhere where you can practice your religion safely.