Brand new? Contact the seller and/or manufacturer about the warranty. https://www.smithcorona.com/

Is this the machine? https://www.amazon.com/Smith-corona-Coronamatic-Portable-Electric-Typewriter/dp/B0112YFSFE

Anyway, if the keys type and the ink isn't showing, the problem seems to be with the ribbon. If it is not advancing, the keys hit the same spot repeatedly, no ink. If it is advancing, there may be a
control that modifies the striking power of the keys and that might be adjusted. If it is not a matter of striking power, perhaps the ribbon was not installed properly or simply was dried out. https://www.youtube.com/watch?v=CF0rskT16jQ

As to the space bar not working, that probably requires some disassembly. Here is a page describing the general problem: https://www.instructables.com/Easy-Spacebar-Repair/

Here is a page for disassembly: https://www.youtube.com/watch?v=UVLDvPdgebU

However, this could easily turn into a fiasco of the type where someone opens up a watch and thinks they can repair it. They don't have the tools nor the technical skills. That's reason enough to call the manufacturer for warranty info and/or support.