I am sorry but what is "300 Go RAM" 300 Go? I only know GB/GiB.
OP is probably French or his native tongue is French. Byte is “Octet” in French and typically you’ll see Go = Gigaoctet which is the same as GB.
I had Adguard running on a Pi 2 I think and it died. Couldn’t access my network remotely. Learned my lesson and switched to NextDNS on a bit more solid device.
If you don't care about high upload/download speed from/to NA<->EU then yes, that's a good move. Otherwise closeness in geo is still king.