There are following steps need to follow.
Magento 2 Admin
[1] Go STORES > Configuration, redirects Configuration section.
[2] Go to General –> Contacts
[3] Right Panel, Expand Contact Us
By Default Contact Us Form Enabled , Select No Option to Disable Contact Us Form
[4] Right Panel, Expand Email Options
Send Emails To: Admin need to put email on which Admin want to receive contact us inquiries. Email Sender: While configuring the Store Email address section Admin already added sender and store email id, Same Senders are being displayed here, need to select the same Sender Email Template: By default, "Contact form (Default)" is selected If Admin want to change, can select any other Email Template
[5] Finally Clicked on Save Config Button