This image shows the Networking section of the Create Compute Instance page.

There is text "Networking (this is a link) is how your instance connects to the internet and other resources in the Console. To make sure you can connect to your instance (this is a link), assign a public IP address to the instance."  

Under Primary network there are options Select existing virtual cloud network (selected), Create new virtual cloud network, and Enter subnet OCID.
There is a Virtual cloud network drop-down list list showing a sample VCN. There is a link Change compartment.

Under Subnet there is text "An IP address from a public subnet and an internet gateway (this is a link) on the VCN are required to make this instance accessible from the internet."
There are options Select existing subnet (selected) and Create new public subnet.
There is a Subnet drop-down list showing a sample subnet. There is a link Change compartment.

Under Public IPv4 address there are options Assign a public IPv4 address and Do not assign a public IPv4 addreess.
There is text "If you're not sure whether you need a public IP address, you can always assign one later."

There is a link Show advanced options, which expands the section.