Advice needed on CFW and using PKHex.

[RadientBloo]

Essentially, I would like to use PKHeX for thing such as item editing, money etc. No Pokemon editing/adding.

Specifically, I'm unsure on which 'kind' of CFW (Sys or Emu) to - 

1. Use to access and modify my save data.

2. How to ensure I can do those things and still be able to use online features (Pkm Home, online battling and such).

Thank you.