How to do a funnel with workpress ?

Hey everyone !

I need someone to help or guide in this process.

I need to create a funnel for a pdf and i want to do it like clickfunnel.

But it's so expensive ! So i looked wordpress and i find Divi to design page.
This is what i looked for designed a good selling pages.

BUT

I don't know how to optimize the back end.

I mean did i need woocommerce to receive payement ?
Is there a plugin to send email ? promotionnal & informationnal ?

If someone who already did a funnel with wordpress can help, i will be very glad !

Thanks !