I was just wondering if they was an option for line correction on photoshop. In clip studio plant there is an option which is called post correction which can be adjust to make the lines actually straight. I am new in photoshop so I am not sure if there is a similar option like in Clip studio paint. Please let me know if anyone knows.
As Billy Kerr said, Photoshop is not exactly the number one application for this. There is, however, a helpful plugin that has helped me in the past to achieve smooth lines. You must buy the license to use it, but the 30 day trial is enough to give you an impression of what it can do. It's called Lazy Nezumi Pro, and can be found here
Other apps that offer line smoothing are Paint Tool Sai (purchased license) and Krita (free, open-source and packed with helpful goodies).
In Photoshop there is a smoothing option in the brushes dialog which can somewhat smooth a brush stroke as you apply it, but probably not enough to smooth out the jitters caused by using a mouse. A graphics tablet like a Wacom would be a better input device. And it is possible to draw smooth Bezier curves with the Pen Tool and then adjust them later, and apply a stroke to it.
However, ultimately, Photoshop is really the wrong kind of software for what you are trying to achieve. Adobe Illustrator a is vector image editor, and is more suitable for line art and illustration. In Illustrator you can adjust the smoothness and fidelity of the Brush Tool. Also after you have drawn the line, then you can do further adjustments to the Bezier curves.
In Adobe Illustrator, here's an example of a line drawn with the Brush Tool, using a mouse, with smoothing applied, also showing the Bezier controls.
Similarly here is an example of a vector line drawn in Photoshop with the Pen Tool (set to "Shape" in the options) with a stroke applied, and no fill applied. Similarly I also show the Bezier controls. I also used a mouse to create this. Note: although Photoshop has basic vector capabilities, it's not comparable to Illustrator which was designed for that purpose.
Another example of what's possible with Illustrator, again drawn with a mouse. Illustrator makes such beautiful and perfect curves and strokes with such little effort.