Opening a fresh Blender, you have 5 panels (from left to right, top to bottom):
Right Click is for selecting (objects, nodes, elements,…).Shift + Right Click is for selecting multiple.Ctrl + Up arrow makes a panel fullscreen (Ctrl + Down Arrow does the opposite).Spacebar is for searching functions.X to delete.More shortcuts available in DDG by searching for “Blender Cheat Sheet”.
Note that shortcuts are the best way to move around in Blender and can save a lot of time. If you find yourself repeating clicking on the same buttons, look for the shortcut and use it. Shortcuts also behave differently depending on the context (the panel where your mouse is).
T is for tools.N is for properties in the 3D View. Tab switches between Object Mode and Edit Mode.Ctrl + Tab : switch between vertex, edge, face