We really ought to go see Yagrum Bagarn if we want to find out what kind of technology stuff is feasible. However, bear in mind that Dwemer Ruins have florescent lights and our cell phone still works here.
We do already have a spear, but it's an absolutely crappy chitin spear. Our current most powerful weapon is a steel longsword, which ingame weighs 20 and does 1-20 damage. A silver spear weighs only 11.2 yet does 5-23 damage, and is worth the same amount of money (80 septims). I just compared sizes in the construction set, and most spears in Morrowind are ~6ft long. Long enough to keep people at arm's length, but not so long as to be awkward up close. If people get right in our face, we can shove them off with the shaft, slide our grip further up so we can still stab them, or draw the tanto. The short spear + light shield combo is a tried and tested fighting style throughout human history, and going by weight, we should actually be able to handle the spear better in 1 hand than the longsword. 2-handing it would probably be best, though. If you're in a narrow hallway, you walk with spear pointed forward, making it nearly impossible for anything to get past it. Point it forward when a beast charges, use it's momentum against it. Reach up and stab cliff-racers. Pry things open with it. In short, get a silver spear.
Remember, in this world (known to have mods), things incomplete or absent in the game due to IRL gamey reasons might not be. Medium armor might not be so unfinished, and even the normal expansion packs and official plugins fixed the gaps in Medium Armor.
We can't keep avoiding PC's forever. We HAVE to interact with Clover, so we can find out exactly what's going on and figure our just who's the Nerevarine. We can't find out who's the Nerevarine if we keep avoiding the other candidates. In the meantime, getting an adventuring party together to loot Arkngthad sounds like a good idea, though bear in mind that Clover may have cleaned the place out when she went to go get the puzzle box. Starting a party might eventually lead to having permanent, trustworthy adventuring companions to do our bidding.
We're in the Blades now, so check if it's cheaper/free to operate out of the South Wall Cornerclub than renting somewhere else.