Based on ring:

The front view is looking down, for example, you can see that the part worn on your hand is the interface.

The top view is the part where you can see the position of the ring when you stand up and get it.

The side view can be the side of the main view or the side of the top view, that is, the part viewed from the left or right side of the main view or the top view.

First of all, if the drawing scale is 1: 1, then draw the front view first, and draw it according to the proportion of everything that can be seen from the front (generally, make a cross hair first and draw it in the center of the cross hair, up and down from left to right).

The top view should be directly below the front view. You should extend the center of the front view and the leftmost and rightmost sideline vertically to the end, and then align and draw what you see on the side. Be sure to align.

The side view should also be drawn according to the front view, which can be the left side or the right side of the front view. Extend the top and bottom edges of the front view to the left or right where you want to draw a side view, and then draw the part of the side you see according to the border of this edge.

If you want a specific painting, it really depends on the style of the painting.

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You can refer to this website, hoping to help you!