Hello from Valais Switzerland

I am a crypto lover and investor. I m 38 years old, man , a chemical engineer background, French but living in Switzerland in Valais region.
The value of my € savings was destroyed by the ECB versus CHF and I discover bitcoin
I am runing a bitcoin full node with ligthning channels (with a Raspberry Pi 4 / raspiblitz).

I would like to run a stake pool for cardano because I trust the projet and his ambition.
I have also a business Idea that could run on Cardano.

I have several technical questions for runing a node @home.
-what is the amount of pledge 500k ADA?
-Do I need a fix IP or can I use my home internet connection
-can I use a cold wallet generated by my ledger for the pledge adress ?