having respect is a good thing, but dont be afraid. There was a time where flashing a bios was a pretty nerve wrecking experience, but nowadays with EZ Flash of some kind from every developer the risks are minimal. You can get the latest bios with a few clicks from official channels, most of the time with well documented How-Tos and sometimes even a windows flash tool.
Using CPU-Z for Identifying your bios Version should work. RUn it, switch to mainboard tab and locate bios version and date. If its 6 Month or newer, keep the current. If its 2yrs or so, get the new one.
3 Mouseclicks later: https://de.msi.com/Motherboard/support/B350-GAMING-PRO-CARBON
With youtube how to do it :). So basing on the date there, if you bios is 2017 or older, get the new. If its a 2018 version, only some finetuning was done.