There are other ways you can work with Ubuntu in addition to your Windows 10 installation without having to resort to dual-booting. These are especially suitable if you rarely need to resort to the second operating system.
For example, you can install Ubuntu in a virtual machine. With this method, you launch additional software, which then loads Ubuntu. So instead of loading either one system or the other, you have Windows and Ubuntu running at the same time. You can simply switch windows. The downside is that this method takes a lot of system resources, so it runs comparatively slowly.
Another way you can work with Ubuntu in addition to Windows 10 is to use a live system loaded from a USB stick. So instead of installing Ubuntu on your hard drive, you just use the USB stick.
You also still have the option of not installing the second system on your own PC, but instead relying on a cloud. For example, at IONOS you can very easily set up a cloud server that runs Ubuntu. You only need an Internet connection to connect, and then use the full resources of the server.