Travel router on RPi5 with 4G

Hi everyone, im making a travel router for low connection places like in valleys inbetween mountains and similar, any help? Im using the Raspberry Pi 5, sim7600G-H and a pijuice.
My questions below

1. Does it matter if i put the 4g hat before the pijuice on the RPi5 or not?
2. Does the 4g hat work out of the box or does it need drivers/special setup to function as a modem? (with a sim card ofc)
3. How do i get the pijuice to soft shutdown through the external power switch connections on the raspberry pi 5? (and hopefully a way to turn on power of the pijuice through it too if possible)
4. How and what do i use to make the raspberry pi act as a router and send out a signal to my usb connected "awus036axml"?
5. How do i get the alfa wifi adapter to host 2.4GHz, 5GHz and 6 GHz using its tri-band functionality? (if not possible please recommend alternative that support it)
6. How do i let the raspberry pi’s ethernet port recieve internet from the system?
7. Does the Pijuice send power in to the RPi5 through the 5v pin or through a cable?
8. How do i get the pi router to start working on startup without me doing anything but starting the RPi5 (get it to start recieving cellular and hosting a network by itself)

Also i would like some smart tips on setting up dnsmasq and hostapd or on using better alternatives if you know about any better alternatives? (possibly openwrt)

I have already found good cellular antennas specifically for this, with the correct cables. Also using the included antennas on the alfa wifi adapter because its more than enough for me.

The reason i want to have a pijuice is since most power banks dont support 5v/5a, is it possible to also power the pijuice from the wall so i can avoid having so many openings on my enclosure? I only want to have the io panel, antennas and external power switch accessable to avoid my family using it wrong if they borrow it, and yes the external power switch is a momentary switch.

Any good global 4g?
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