Hi,
To start taking her clothes off, you need to unbutton her night shirt, while she's laying on her back (face up to camera).
As for the help in translating the game, if you'd like to help others, please join our Discord server, find "translations" channel in "global" category and find the thread with the language you'd like to help.
Translating doesn't require any coding knowledge, everything is done in the excel sheet provided by the dev and managed by translation moderator.
The best way to start, would be to find the language thread and ask there if other translators need help.
Cheers