Hello Arnaud - I'm androgynous (as I would say) and this means for me I feel female as well as male. So of course I want to express both of my sides. For my male side this is of course no problem. But I made the experience that also for my female side the problem is not as big as I thought. First of all I like longer fingernails and have been at a nailstudio (don't know the correct word but think you know what i mean). Only three of my 90 colleagues made a remark - one asked me why? and the second only made a remark because his wife owns such a studio, and a young lady showed me hers - fresh done - and told me that she thinks it looks good. As you I like high(er) heels - so I started to wear bootees with heels between 4 and 7 cm - and - imagine - nobody made a remark. Of course I took those from my shoe collection not looking extraordinary female - I have to admit. What I want to say is - I didn't changed my clothing in total. I would assume that this would be even more obviuos and interesting for the people as the way I did. My normal dress (Jeans / Shirt e.g.) and the shoes I like. If you want to "hide" the heels a little bit choose e.g. a jeans a little bit longer as you normally wear.
So my suggestion would be - if you have no problem with you appearance as man - wear your "normal" style and the shoes you like. Start with heels and not high heels and see how you feel with it and see how people react - if they do at all.
Regards Nicnique