Click on the "Nintendo Homebrew on Discord" link from 3ds.guide. Ask your questions in either Assistance-1 or -2. Someone there should be able to lead you on the path to updating boot9strap(B9S) to v1.3 and Luma 9.x. Normally, updating to the latest Nintendo firmware w/ CFW is safe. If you open system settings from the home screen and the FW version reads "Sys 11.6.0.39U", you're good to go. Just update B9S and Luma.
https://3ds.guide/updating-b9s
Good luck.