Hi Everyone,
I am hoping to get some help / insights / suggestions on how to set up my energy monitoring. I am very new to home ownership, and hence everything around energy / power consumption is a bit difficult for me to grasp, but I ama trying to wrap my head around it (however I am a sucker for data so naturally I want to track nearly everything in the house :D).
The situation:
I have a Landis+Gyr E360 LTE in my garage. An EV charger is connected to it directly. The P1 port is used by a Perific Monitor load balancer. There seem to be no integrations for it, but this is a discussion for another day, the reason for mentioning is that the P1 port is occupied, and while I can use the Perific app to see total power consumption, and per-phase consumption, I cannot (yet) bring this into HA (and even if I could, it is not granular enough data for my needs).
Inside the house I have this beauty:
I will be hiring an electrician to replace this with a modern electrical panel, and help me figure out what rooms / outlets and hardwired stuff is on which circuit in the house. (there documentation I got from the previous owner is very vague). The electrician is also needed to do some other electrical work around the house.
What I would like to achieve:
Ideally, tracking the power consumption of every single circuit in the house separately (I thought this was a better idea than turning every wall outlet into a smartplug to do per device tracking? My thinking is that if there are 2-5 home appliances / lights / heaters (electric heating for now) on the same circuit, I would be able to tell what is on/off by the changes in total power drawn.)
Questions:
Are there complete electric panels that can be integrated with HA out of the box? Or do I have the electrician bring a panel, install it, and then add Shelly or other devices on top? Which ones? How many? Anything specific I need to say to the electrician? As you can tell I am a bit lost in this topic. 
If you have any suggestions, references to reading material, documentation, etc… I should look into our watch, please let me know!
I appreciate if you take the time to help a noob out! 
Have a nice weekend!