Here is a simple way to get comfortable using Path Tool.

Start a new document. Your preset choice.

Then hit the Ctrl+’ (Mac:Command+’) to turn on the Grid, as I have captured below.
Alternatively, ‘View/Show/Grid’.

Photoshop Path's Made Easy

Next, enable ‘Snap To/Grid’ via the same Window command as captured below.

Photoshop Path's Made Easy

Next, select the Pen Tool (P) from the Toolbar and enable the ‘Paths’ Option Bar feature for this active tool, as I have captured below.

Photoshop Path's Made Easy

Then attempt to mimic the short demonstration I have captured below, ensure that on each click (Adding an Anchor Point) snaps to your chosen grid line.

Photoshop Path's Made Easy

The above example creates a simple half circle in a simple click, click and drag and click motion.
It’s easy to see that using the Snap To/Grid’ option can help you get a better grasp using the Path Tool or for even creating precision Paths when tracing over objects.

Below follow’s the same above technique to complete a closed circular path.

Photoshop Path's Made Easy

You can also snap to grid on a angle as the below demonstrates.

Photoshop Path's Made Easy

For further control over the angle and position of your Anchor points, the below demonstration shows you how to cut off a smooth handle to allow for sharp angles. (Otherwise known as Convert Anchor Point – the equivalent tool under the Pen Tool fly out menu)

Photoshop Path's Made Easy

These are just a few demonstrations to help ease the learning curve of Photoshop Path Tool.
By enabling the grid and snap to/grid feature you can make precision paths in no time and can eventually get you to the point where you will no longer need to rely on them.

Tip: Toggle the Ctrl+’ (Mac: Command+’) keys to enable/disable the grid.
Ctrl+Shift+H to toggle the Paths visibility.