Download the official manual, set your Snap to "Endpoint," type L for Line, and start drafting. Have you used a specific LibreCAD tutorial that changed the game for you? Let us know in the comments below!
Unlike AutoCAD, LibreCAD uses a modular interface. PDFs help you distinguish between the Toolbox (drawing tools), Command Line (the brain), and Layer List (the organization system). Librecad Tutorial Pdf
LibreCAD handles linear, aligned, angular, and radial dimensions. A PDF tutorial will teach you how to set the "Dimension Scale" so your measurements look correct on a printed page. Download the official manual, set your Snap to