Left click select, drag to box select, double click selects all of a type.
Right click moves, attacks, harvests or sets a rally point. A then click to attack-move, S stop, D deploy MCV.
Ctrl+1..9 make a group, 1..9 recall it. WASD, arrows, screen edge or middle drag to scroll, wheel to zoom, H jumps home, P pauses, M mutes.