Would anyone know what is the best way to wire my 3 smart switches. 2 of them are single pole, 1 of them is a 4 way switch, there are only 2 bundles of neutral (see picture) how would I wire 3 Switches to 2 bundles, all 3 smart switches need a neutral wire, any ideas? Sorry but I'm a newbie to this. I have wired a separate smart switch to another location of home, but it was simple since it was only one switch in box. Thanks for all your help.
A "cable" is several "wires" wrapped in a sheath.
In order to get neutral to a smart switch, you must follow the cardinal rule. Note the (hot) wires already attached to the switch. Note which cable(s) those hot wires come from. You can only take neutral from those same cables that hots come from.
You have two totally separate groups of neutral. You must follow the wires and take the smart switch neutral only from the bundle associated with those hots.
On the 4-way switch, you will not be putting a smart switch here. There are at least 3 switches controlling that light. You will need to open them up and look at the wiring layout present at those switches. That wiring will dictate to you which one to replace with a smart switch, if that is even possible.