Thinking of upgrading my PC and need some advise

. Thank you!
Current set up:
Geforce GTX745 4GB DDR3
i7-4790
CPU 3.6ghz
Ram 12gb
Requirement for new PC:
WIFI
Bluetooth
Support M2
Support dual display
Type C port (preferably/ optional)
Support window 11
Support 4K (preferably)
At least 3 slot for ssd/ harddisk
Is the entry level sufficient for me?
Usage mainly for watching movie/ drama, some documentation work, browsing, playing music occasionally.
No gaming at all.
Intend to use back the current SSD and hard disk.
Does tradepac help to assemble the 4 items? Usually how much do I need to add-on?
Does asrock B550m Wifi SE support dual display, or anything to add-on to support dual display?
Or any mobo slightly higher grade that can support?
Is it possible to sell my old unit without hard disk hehee?
TIA!