https://imgur.com/a/fwPvgoz

Sonatus is just a few Extractors and the Prime. If you take a straight line you'll usually end up around the Warden Spire to give you a proper Orientation of where to head to. Once you have the workshop there's a chances there's a refinery near by, it's probably worth doing a fast mission and dropping a few cores on it to increase your income for Electrum.

Side Note: Used a dreadnaught icon for the Prime, haven't got an icon for it yet.