[VIRTUE theme] – Need some help

Hello everyone.

I have installed a great theme for free “Virtue”. How can I creat a quick login for users ( name, email, images of produtcts) and to let them post their product for selling. (I don’t want them to post from the dashboard, but to creat something simple, ex. When they click the button ADD PRODUCT, to get required: name, adres, price, and to creat there a password for that post and to postit. )

Thanks,