Hello welcome to makerspace. I am glad you have chosen to do 3d printing, But i am confused to the nature of the questions. These are my initial responses. I hope i am helpful.
Response to both point 1 and 2: If you are a Dallas makers space member with the proper training, Then we require you merely stay at your print (meaning in the building) or have a proxy (meaning in the building near the print). Finally clean the 3d printer and purge the nozzle with fresh filament. if you are using our 3d filament please pay. pla and abs may be purchase at micro centered or online. The length of the print is how long you can stay or your proxy can stay.
The class is here - https://learn.dallasmakerspace.org/course/view.php?id=2
Response to point 3, there is no fiberglass. We have resin printers these work via a photo sensitive material that is exposed layer after layer to UV light. This solidifies the resin into the form the user desires. This additive method takes place on the roof of the 3d printer usually. We have filament printers for abs pla and ninja flex. Abs needs a acetone vapor bath to be smoothed