If you want to set up a contact page for people to be able to reach out to you, the simplest way is to set up a simple page like this and list the different ways people can reach out to you.

For example, here's how to reach us!

If you prefer to use a contact form, almost all of the great embedded form services work great with Ghost and are easy to set up:

Antonio Carlos Pereira Gomes ME 

CNPJ 22.103.145/0001-50

WhatsApp/Telegram 16 98166-7878