From the Start, I Have an Interstellar Mothership

Interstellar Novels with Warships, Fleets, and a System

Space travel and battles between space fleets, without mechs, and with a System eventually.

Interstellar, Technology, Mecha, and Starships

Something normal.

Everyone Awakens a Starship, and the Protagonist Commands an Aircraft Carrier Fleet

Looking for books like Mecha Girl Era: All My Mecha Girls Are World-Class (Code Name: Kindling).

The Male Lead Has a Space Battleship from the Start

A warship upgrades and roams through space, encountering space pirates.

Stories Where the Protagonist Returns to Earth with a Fleet of Starships and Shows Off His Power

Any books where the protagonist starts out with a bunch of newly acquired stuff, returns to Earth, then shows off their high-tech weapons and gives everyone a good thrashing? Please, I'm begging you!

Traditional Fantasy With a Single Female Lead and Delicate Prose

Interstellar High-Tech Sci-Fi: The Protagonist Is a Researcher and Mecha Engineer

I'd like to read something like I'm a Mechanical Lifeform, So Building a Star Destroyer Makes Perfect Sense.