Hello I am a inexperienced DnD player so I am looking for some feedback for a character build and background I have been working on for a while.

• Backstory
  • inspiration
    • Jim Raynor of StarCraft fame is a farm boy who joins the marines to help support his family. Distinguishing himself as a leader he rose through the ranks. After falling under the influence of Tychus Findly Jim fell into the complex world of the marine corps' black market. After a botch heist the pair went AWAL and became outlaws. After another bad heist Tychus went to jail to give Jim the chance to survive. Jim settled down as a marshal starting a small family. After the Confederacy took his son and wife died of the flu, Jim join a anti Confederacy rebellion. He was given command of a small unit that became known Raynor's Raiders.    
  • background:
    • Marine (Because his roll in the military)
      • Personality trait: I am always working on some project or other
      • Ideals: Bravery. To act when others quake in fear. (Jim is known for his crazy bravery.)
      • Bonds: I must set an example of hope for those who have given up. (This seems fitting for a rebel)
      • Flaws: I hold grudges and have difficulty forgiving others. (Jim is abscessed on killing his old commander and his ex-girlfriend both who are mass murders)
    • Backstory
      • James' early life started on his family farm of four generations. Life on the farm was of hard work and his fathers life lessons.
      • At a young age his grandfather taught him how to shot and hunt.
      • on his 18th  naming day he was drafted into his lords levies. Though he was never been on board a ship before  he was placed on ship as a marine.
      • the love of his life was a sorceress that they served on the same ship. After an adventure for a necromancer's tomb she was abandon and left for dead.
      • Afterwards he went AWAL. 
    • Build
      • Race 
        • variant Human taking the crossbow expert feat
      • class
        • Fighter
          • 5 levels
          • Battle master
            • maneuvers
              • precession strike
              • rally 
              • menacingly strike
          • capping the 5 levels with sharp shooter
        • Rogue
          • levels 3 
          • archetype Thief for the quick hands skill for the ability to use items as a bounce action.
        • Artificer
          • the remainder of our levels will be in artificer 
          • Infusions 
            • the main one I want is the homunculus servant
          • Archetype Artillerist 
            • the ability score improvements are to improve our dex and intel.
      • My main reasoning for this mix is that the fighter and rogue's action economy will help enable the artificer's abelites. I chose fighter because he was a grunt, rogue because of his turning outlaw and I choose artificer because you can reskin the infusion of the homunculus servant and eldritch cannon as some Jim's iconic units. 

 Edit: A far as I understand it the homunculus servant can carry and move the eldritch cannon or any of the alchemist inventions delivering them to who needs them or a bag of explosives, its basic its a guided missile for a hundred gold.

 i love this idea! i think it would work great!