Mate; couple of quick question:
What do 'you' mean by heavy?
To keep things really easy let me give you a simple example ok?
If you can lift 20kg above your head 5-10 times then I would suggest that this is not 'heavy'...but if you can only lift 20kg above your head 3-4 times; then thats heavy.
Mate; get some of that crazy Irish pumping some heavy weight...dont be scared..dont be intimidated by beautiful gym people or gym staff......
Grab life mate....grab some heavy objects and find out how bloody amazing it is to chuck them around!
Forget high reps and apologising for other peoples ignorance mate....GET INTO IT!
Lift heavy..lift smart....dont apologise for being diferrent...you may well just inspire other women to break free also.
Good stuff CHAMPION!........GO FOR IT.