The four transforms
Every build starts with the toolbar quartet: Move, Scale, Rotate and the color/Material picker in the Properties window. Learn the Ctrl-hold snapping behavior for grid-aligned building — clean, aligned geometry is the difference between a playable map and a collision nightmare.
Parts, models and anchoring
Everything is a Part until grouped into a Model. The single most important property is Anchored: unanchored building parts fall through the world. Workspace organization (naming parts, grouping models) pays off the moment you add scripts, which address objects by name and path.
Your first script
Luau, Roblox’s language, starts small: a Script inside a part with script.Parent.Touched opens the world of triggers — doors, checkpoints, kill bricks. The Creator Hub documentation plus the Toolbox’s free models teach faster than tutorials; open a free model’s scripts and read them.