Windows 11 ( with Nvidia GPU) and Qubes OS Dual Boot

Newbie here and trying to Dual Boot my Lenoto P14S Gen 6 (Intel ) laptop with Windows 11 and Qubes OS. My laptop has 16 GB Ram and a single 500 GB SSD. It has a Nvidia RTX Pro 1000 Blackwell Generation Laptop GPU. .

I am trying to follow the thread below and want confirmation if this is still relevant. The thread seems to be 1.5 years old.

Securing a Qubes OS and Windows 11 Dual Boot - User Support / General - Qubes OS Forum

My queries are two parts

Part 1 )
I currently have 3 partitions of my disk

Disk 0 Partition 1 260MB EFI System Partion

Disk 0 Partition 4 1.95 GB Recovery Partition

Windows ( C) NTFS Bitlocker encrypted ( Boot, Page file , Crash Dump, Basic data Partition) 474.72 GB , Free space being 378.95 GB

I want to use USB to store the Qubes OS bootloader and it seems to be working as per user Dmolliae

I guess that would eliminate Windows messing up with Qubes Boot loader.

Do you guys see any issues in it?

How many partitions do I need to create on my Disk for Qubes OS - Just 1? And I guess it will come from the C Drive which is 378.75GB free.

Any specific tool to create this partition or can I just use Windows Disk Management ?.

Part 2)
I heard that Nvidia GPU causes issues with Qubes OS. will it effect me as my laptop has Nvidia RTX Pro 1000 Blackwell Generation Laptop GPU

Some part of this thread is discussed on Reddit but I thought to bring it here for more attention. Thanks in advance