I need to create a Steel Defender companion as an artificer in prep for my next level up but I'm reasonably new to Roll20 and I'm not sure exactly how to do it. Could anyone offer advice on the easiest way for me to build it? I asked my DM to provide a character sheet and I'm prompted to create an NPC or a Playable Character with the Charactermancer. Has anyone done it and wouldn't mind sharing their more experienced learnings?