no need to apologise we all have to start somewhere, i too have the 3018 and may or may not have a different control board to yours so what i would first suggest is put a couple of decent pictures on here of your control board first and lets have a look at it.
whilst waiting for your pics to appear i will go ahead and give you some solid advise regarding your machine's reliability.
1) make sure your machine is perfectly level in all directions use a laser if you have one or alternatively a Vernier or last resort the good old tape measure.
2) check your spindle mount for movement even though it's a new machine i can assure you there will be some movement already and will get worse over time and my recent post has step by step instructions on how to make it zero movement and solid.
3) lubricate the lead screw rods every 3 months depending on use with either food grade silicone (the white stuff) or good old fashion 3 in 1 oil but don't saturate them.
4) I recommend making a Z zero probe (again i can help you with that very easy to make and only takes a few minutes to do)
with regards to engraving glass it is possible but in order to gain good results you will need the probe and as for the bits i would suggest using diamond coated 3.175mm or 1/8" shank (plenty in hardware stores and on ebay) and make absolutely sure you are wearing eye protection even when setting up. also once you have the probe working and have found the sweet spot so that it doesn't break the glass sheet you will then know the right amount of pressure required to engrave it without causing damage to the glass (again i can instruct you on how to go about this if you need the help)
if you have anymore questions please just ask and in the meantime i'll wait for the pics of your control board as mine has the facility for both 12v and 24v as pictured but yours might not be the same