If you're new to modding and don't have extensive experience with micro-soldering then I would recommend sending it to a good repairshop.
You have a V2 Switch and installing an InstinctNX or PicoFly is not for the faint of heart and in some case, some adjustments need to be made.
For the Picofly the manual is here :
https://gbatemp.net/download/a-definitive-picofly-install-guide.37968/
The Picofly is more popular here as it is something like the community supported open source modchip.
https://gbatemp.net/threads/picofly-a-hwfly-switch-modchip.622701/unread
Avoid Chinese knockoffs if you consider this modchip.
For the InstinctNX, there is a thread here :
https://gbatemp.net/threads/instinct-nx-chip.628676/
But it is not as popular because it was expensive and somewhat closed source.