To make improvements on samopisnom website

Hi all, we have in-house website, we need to make improvements:
to implement a shopping cart, a menu selection of goods.

payment terms – the usual transaction payment (made at the server)

payment to Yandex, WU, on Sberbank card, Zolotaya Korona, etc.

who can and is happy with the terms, write, discuss, show code, etc.
Thank you