Contact form and mailing list set up

Hi again.

im a free member at zoho sites and i have zero experience about forms and mailing lists which i will use
for my site. i want to set up correctly the contact form and the mailing list form in order to testing and to
see if they works fine before to go into premium plan and my own domain.

i want my site visitors to sending me their enquiries through the contact form and to join my mailing list
that allows me to sending them newsletters through my zoho mail account. can you tell me please which
of the settings in these two forms i must edit or change?

Please give a little more attention to my question and to be as much specific because it has high priority
for me.

thanks again for your support