No worries. If you haven't used Blender much it's intimidating, but you only need the most rudimentary functions. Google is your friend, but keep an eye on version numbers when looking for help there. Depending on your use-case you could skip Blender entirely - assign materials a texture in SketchUp, export as Collada, import to Unity/Godot and they should have UVs - but surface normals, especially smoothed, aren't often carried over. Good luck ^_^