can you tell us your device name and possible exact version string?
In the feedback thread a few users report the Bliss launcher crashes for an FP3 too - Feedback for v1.9 - #177 by hook … but not everyone is affected.
Can you access the Settings? if you install any launcher .apk via a PC that runs adb you can set it as new launcher default.
For the connectivity problems, there are mentions at Feedback for v1.9 - #314 by Cormor for an FP3 but I see little details to go on… are wifi and/or mobile data enabled in the quick settings?