I agree with all of the above.
HRT deposits fat in the traditional 'female' areas, reduces muscle, and generally softens your features.
Wear clothing that flatters your figure in a feminine manner. If you need to experiment, secondhand and thrift stores usually have a large variety of different styles. Plus SHOPPING!! I had terrible taste in clothing for quite a while until I finally figured out what looks good on me.
Develop feminine carriage, poise, and mannerisms. It doesn't have to be flashy, but how you carry yourself affects how others perceive you. Do some girl watching and take notes on what seems feminine to you. Smile! If, for nothing else, smiles are usually contagious.
I know several cisgender women who have broad shoulders, wide chests, small breasts, big feet and hands, and/or other traditionally masculine features. Nobody ever sees them as anything but a woman. Quite a bit of it has to do with how they carry themselves and what they wear.