Woocommerce Custom Plugin

Hello,
I want to develop a plugin for woocommerce so that user can visit my store and can be able to submit their custom clothing measurements for tailoring to achieve this i found one plugin called “woocommerce custom tailored shirt online” but as this is gents only plugin i talked with developers before buying but they said it does not support women’s clothing and they can make a custom plugin for me but their quote was too high, so i decided to bulid my own plugin, so i purchased tutplus tutorial for understaing development i understand that tutorial but my question is how i can know which action i should use to achieve tasks which i want for example i want
1.Custom button on product page which will lead customer to custom tailoring page.
2.how i can take form data and add that data with woocommerce product data and show it in “orders” panel
3.add checkbox on backend of product page so that admin can mark product to hide or show custom tailoring options on front page.

so far i managed to figure out how to add checkbox on backend.
using this tutorial
http://www.remicorson.com/mastering-woocommerce-products-custom-fields/

and managed to add a lable field on product page using tutplus tutorial.
so anyone please guide me through or atlist list required action/hooks or filters required to achieve this task. sorry if this question is broad but i am totally lost.