For your glass blocks,
it is suggested that you use the BOX command and make as many as you need, or make only one, and then use 3d arrray to make the remainder.
Then make a bigger box the size lager than these blocks and just slightly thinner, then use a solsub to remove the blocks from the bigger slab, this holey piece then gets the Mortar material applied to it. The blocks get the glass material.
For your door knob, you could either REVOLVE a polyline shape, or draw a series of circles and ovals and Loft it, or draw some other 3d primitives and Soljoin them together. Use a BOX the size of your door, then the align command to get the knob on the door. Lastly you would be advised to group these objects together, (check into groups and pickstyle) as a block, or a group.
