how do you connect 1st gen apple pencil to new ipad with usbC type connector?

The first generation Apple Pencil is not compatible with the iPad Air4 or 2018/2020/2021 models of iPad Pro. A first generation Apple Pencil uses the physical Lightning port of a compatible iPad for both pairing and charging the first generation Pencil. This pencil can only be used with compatible iPad models that have a Lightning connector.

The first and second generation Pencil use an entirely different pairing and charging interface. The second generation Pencil can only be used with iPad models that have the magnetic/inductive dock that is exclusively designed for the Pencil. Charging is controlled via the iPad magnetic dock; the second generation Pencil cannot be charged using a charging mat or Qi charging solutions.

In summary, the Apple Pencil models are not interchangeable - and can only be used with the iPad that has appropriate internal hardware.

Here is the definitive compatibility list for Apple Pencil and iPad:

Apple Pencil (2nd generation)

You can use Apple Pencil (2nd generation) with these iPad models: 

• iPad Air (4th generation)
• iPad Pro 12.9-inch (3rd generation) and later
• iPad Pro 11-inch (1st generation) and later

Apple Pencil (1st generation)

You can use Apple Pencil (1st generation) with these iPad models:

• iPad (8th generation)
• iPad mini (5th generation)
• iPad (7th generation)
• iPad (6th generation)
• iPad Air (3rd generation)
• iPad Pro 12.9-inch (1st or 2nd generation)
• iPad Pro 10.5-inch
• iPad Pro 9.7-inch

Not sure which iPad you have? Identify your iPad model.

You don't, sorry.

You need to use a 2nd generation Apple Pencil, as per this compatibility list:--> Apple Pencil compatibility – Apple Support

Regards

Giulio

Nope.

You need to purchase the 2nd gen Pencil.

Both versions of the Pencil pair and charge differently.

Sorry.