Safe mode starts your computer with basic drivers and on default settings, it has basically of two types. Safe mode and Safe mode with Networking. Whatever problem you're having with your pc, if it didn't occur on safe mode, it means your drivers are working properly, and you need to troubleshoot your problems on your PC, There are many online learning programs
https://elearningways.com on which you can learn all these things easily, when you’re running your system on Safe mode with Networking, it includes networking drivers too to check if there’s any problem with that or not.