The Pcb design rp2040 basic board

I am very new to pcb design, I have only dealt with dev boards till now and electronic components attached as peripherals. I am using Kicad 7, designing a basic Rp2040 dev board based off of Technoblogy’s David Johnson-Davies’ design (http://www.technoblogy.com/show?3U75) as an exercise. In the image I have tagged( I dont know how to append a kicad file) I am referring mainly to rp2040 chip. In David’s Schematic, pins 46-49 are connected to 3v3 and debounced by a small 100nf cap and pins 50 and 45 are connected to 1v1 and debounced the same. On the qfn56 footprint of rp2040 these pins and similarly others are sometimes huddled together or else they are somewhat far apart.

I have provided an image of the pcb design. The schematic is the exact same one as the link, with only an addition of a usb connector and explicitly showing the header pins.

My question is, should I go through the effort of connecting these pins, be they far or adjacent? And does the answer depend on if these pins are shorted internally in the chip?

Also, should I connect all the ground pads of rp2040 and the usb connector? Is it necessary?

Also also, if I have to connect these pins which are huddled together, can i just connect the pads immediately where they are INSIDE THE FOOTPRINT instead of drawing them out and joining them.

If any answers start with ‘depends’ could you please list out pros and cons. Thank you so much.

I tried to read the datasheet to know if these pins are internally connected but I think they aren’t after what I read. I would like a confirmation from anybody.

Im worried about the routes I drew inside the footprints of rp2040 and the usb connectors. I added vias under the chip and im not sure if I should.

Thank you so much

Bonne-Journee