I am just answering to the anti-virus question: So far there is no official scan software that will manage to scan click apps for example. The one in the store was a fake, it was literally doing nothing except showing a GUI with "you are at risk" or so. Do not use it. The biggest issue was that it was running under full confinement, so it had not even the rights to scan everything besides itself.
I dont really know whatΒ΄s the current situation with viruses in Linux/Ubuntu. Are there proven Anti-Virus/rootkit/Malware scanners that really make sense? Never used one in Linux tbh...