This is a simple workflow designed to be modified once and then you can just zoom into the important parts in the middle.

It features an image comparator, so you can quickly see difference between your normal image and the upscaled version. Additionally you can select a custom VAE in case the checkpoint you choose does not have one baked in.

If it does have one, just mute the VAE node and connect directly from the checkpoint node to the VAE Decode at the bottom left and the Ultimate Upscale node in the bottom right