Thank you so much for your help guys! Really appreciate it

Hey geniuses of the world, I could use a little help

I'm VERY new to sketchup and 3d printing. I tried my hand at modeling my company logo off a 2d drawing, and impressed myself with the results UNTIL I rand solid inspector and found a bunch of errors that I don't know how to fix.

I did search the forums and found what seem to be similar issues, but I'm just not understanding what needs to be done here. Like I said, I'm very new and don't understand all the lingo and technical jargon just yet.

Could anyone take a look at this and give me very simple, easy to understand steps on how to make this printable?

I really want to learn. Thanks in advance. GSI.skp