Like the others, plan for a simple robot (that means cutting scope - functions, mechanisms, etc. Adam Heard has great talk on this). You should not put yourself in a position where you’re “obsessing” about weight savings as a rookie.
However I DO recommend you at least track your weight as you build the robot, and maybe even go so far as to make a weight estimate before you build it. This will help your team both refine the skills and processes needed for future seasons, and allow you to identify if things aren’t going to plan as early as possible and course-correct if it looks like you’re on track to be too heavy.
Like Connor stated, don’t make inspection the first time you weight your robot. You