Limited character customization help?

Hi all,

Sorry if this has been asked a ton of times, but I’m really struggling to add character customisation to my LL story…
I want very limited customization in my story with the only thing readers are able to change is the MC eye shape, nose shape and mouth shape (female).
Could someone kindly tell me how I would be able to do this? Any script I copy and paste tends to have an error somehow and I’m not quite sure what I’m doing wrong?

Thanks so much in advance and apologies again for the overasked question.