There are a a few more male nurses in some areas (A&E, critical care. etc.). There are still not that many though. On wards there tend to be far fewer. I was the only guy on both of my ward placements. There are times it would be nice to have more of a gender balance in the hospital.
About doing personal care (which is probably more daunting for men at first).. it depends on your attitude - if you are professional in your work and you present yourself professionally, it is OK and people will see you as a professional.
Few patients care that I'm a guy. There may be the odd person who does mind and that's fine..there are plenty of women around to look after them. I find some patients prefer to be looked after by guy.
Where you think you really need a chaperone - and these occasions are rare - you ask for one and they'll always be someone around.
I also find there are occasions when women are pleased to have a guy around. Especially when some physical strength is needed (like picking someone up off the floor or doing CPR).
It's a good profession and it would be great if more men went into it.