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Ubuntu 22.04.1 LTS is the first OS that has only ROS2 Humble support.

Source: https://docs.ros.org/en/humble/Releases/Release-Humble-Hawksbill.html#supported-platforms

There is an option to have ROS1 Noetic next to ROS2 Humble, but it is highly discouraged for new users:

• https://docs.ros.org/en/humble/How-To-Guides/Using-ros1_bridge-Jammy-upstream.html
• https://packages.ubuntu.com/jammy/ros-desktop

The release of ROS 2 Humble (and Rolling) on Ubuntu 22.04 Jammy Jellyfish marks the first ROS 2 release on a platform with no official ROS 1 release. While ROS 1 Noetic will continue to be supported through the duration of its long term support window, it will only target Ubuntu 20.04. Alternatively, there are upstream variants of ROS 1 packages in Debian and Ubuntu that are not maintained as an official distribution by the ROS maintainers.

I really suggest that you just start with the ROS 2 Humble LTS version, it will be easier for you for sure.

Ubuntu 22.04.1 LTS is the first OS that has only ROS2 Humble support.

Source: https://docs.ros.org/en/humble/Releases/Release-Humble-Hawksbill.html#supported-platforms

There is an option to have ROS1 Noetic next to ROS2 Humble, but it is highly discouraged for new users:

• https://docs.ros.org/en/humble/How-To-Guides/Using-ros1_bridge-Jammy-upstream.html
• https://packages.ubuntu.com/jammy/ros-desktop

The release of ROS 2 Humble (and Rolling) on Ubuntu 22.04 Jammy Jellyfish marks the first ROS 2 release on a platform with no official ROS 1 release. While ROS 1 Noetic will continue to be supported through the duration of its long term support window, it will only target Ubuntu 20.04. Alternatively, there are upstream variants of ROS 1 packages in Debian and Ubuntu that are not maintained as an official distribution by the ROS maintainers.

I really suggest that you just start with the ROS 2 Humble LTS version, it will be easier for you for sure.