You can withdraw anytime from 55. The amount you can withdraw depends on your birth year and the age you are making the withdrawal. If you have met the FRS, you can withdraw any amount above it. Do consider making that withdrawal in your retirement years.
TV-MA is a more severe rating than R. TV-MA is the equivalent of NC-17 in the US. Note that R and MA are used by two different groups. The MPAA (Motion Picture Association of America) uses a rating system that you can review here where R is the second most severe, coming up behind NC-17.
