Firstly - as the unofficial C3D “it’s fine to fail group leader” the first thing i would say is that i see no anger here, and that is good, because as we all know "anger leads to hate, hate leads to wrong Feeds and Speeds and wrong feeds and speeds leads to end mill abuse. #Endmillshavefeelingtoo
Second - and i mean this with the upmost respect, go find your wife and then say listen lady you know nothing, and to prove it to you i am now going to buy a Kern Micro 5 axis with robot pallet loader, or say i didnt complain about that crap you served on the table last night…
(now for the real response, i made my wife a Wonder Woman sign, was it the best, NO! Could i have done better YES! did i learn allot from it YES, but most importantly she loved it because you cant buy this anywhere else, also remember there is a 1-2-1 relationship between gift to wife vs new parts for the SO3, my example wife got Wonder Woman Sign i get suck it dust boot!, so pro C3D Tip WWSFTW or Wonder Woman Sign For The Win!
Now i think you are if you don’t mind me saying, in the same position as 3/4 of us have been, new bit of kit sitting in our workshops, and saying to us “Well do something” and we are like, Jog left Jog Right 
So i would suggest focus on small project to begin with, this was my issue, when i first started, 2nd cut and i was trying to do jobs over 2 hours and it all went to CRAP, because i didn’t “get it” by that i mean tool change , offsets, Pause Feedrate etc.
I then fell into despondency because i could not get this machine to make my thing!!, I was told by many members on here, not do not run such big jobs, rather build up to it, and i would suggest the same.
I would recommend the following, and i know this is like Pen + Paper no one has time for that!
But as armature machinists, we need to be methodical, we need to focus, and most importantly we need that secret fist pump when this all goes well!
SO i would write down a small list something similar to
1 - check machine (yes) you have done this but allot of the issues if not upper 60% are to do with Squareness, loose bolt here, screw there etc. sooo square machine, check everything there are loads of good info here including Will’s world famous checklist.
2 - This then leads into the “Circle, Square triangle cut” this gives you so much feedback on the machine and how well you put it together.
3 - All being good there, move onto small stretch goals sub 3x3 inch cuts.
3.1 contour
3.2 Pocket
3.3 tool change
3.x xxx
The goal here is to really understand them, not just X done move on, as in i know that if i change x, y will happen then run the job to prove it.
4 - Start to increase job complexity by doing variations on the above, like intentionally switching machine off and figuring out how to recover etc (as per your current post that i am replying too)
5 - Achieve God Like @Vince.Fab status, but i am sure he will not mind attesting, that he did not unbox SO3, get some 6016 aluminium and then first cut make a manifold for his cars (though saying that annoyingly he probable did LOL justt kidding )
My point to this reply is to try and help you focused on this equation
Foundation + knowledge + inspiration = SO3 & @circsaw partnership.
So remember this soon to be famous saying from me "i Know i can make anything, my machine knows it too, i am only limited by M.E. (My Experience) ) - Jon
Ease into it i / others are here to help! keep smiling!
Jon
YEP, I literally just went through and put “any” smiley that had a damn tear on it (whether laughing or crying) just…TEARS dammit! TEARS lol