Steps to be followed:-
1) Top right side click (Products and Services) tab.
2) Click (New Item) button.
3) Fill all fields in the form and click (Save) button.
4) Check your Product Group in available in this list. If not, contact Admin to add.
Notes:-
a) Check down below category list in (New Item) form. If Group name of your product list is not available in the list -> Send support request (Open Ticket) to Admin or contact Admin.
b) Contact admin if you you still find difficult to add new products.