OK, I can understand the thinking behind the fit - especially putting a weapon in the high slots to deal with rats in the belt. However, you are better using drones for that. And as others have said (hello @Random_Rick) avoid the civilian modules - they are there to give a very cheap option, but are generally a lot lower performance than even the weakest “normal” item.
The expanded cargohold rigs only apply to your main cargohold (small) rather than the Ore Hold. They give almost no advantage to a Venture.
I’d be looking at something like:
Basic Miner
[Venture, Basic Miner]
Mining Laser Upgrade I
5MN Microwarpdrive I
Medium Shield Extender I
Compact Multispectrum Shield Hardener
EP-S Gaussian Scoped Mining Laser
EP-S Gaussian Scoped Mining Laser
[Empty High slot]
Small EM Shield Reinforcer I
Small EM Shield Reinforcer I
Small Thermal Shield Reinforcer I
Acolyte I x1
A lot of fitting decisions in Eve are personal preferences, but I like with a Venture having an MWD as it gets you near to the better rocks faster (and away from the warp in point as well). It’s a shield fit - good enough to handle rats, but like any Venture, you survive by running away from other players if you don’t like what you see.
Which drones you use are, again, preference. Anything will do, some are better against some rats than others - look up NPC damage types and you’ll get a flavour of what to optimally carry, but in practice that’s fine tuning for a miner in hi-sec space.
The Meta miners (the Scoped ones) are better performance than a Miner I and reasonably cheap. You are a miner - this gives you a better mining rate. Fit compact miners if you can’t handle the fitting space.
Meta medium shield extenders are nice, but compared to the rest of the fitting (and your likely budget) rather expensive and not needed - you are only looking to soak a little damage up while your drones deal with the rats.
The whole lot is about 1m ISK - though you can re-fit the ship you currently have to keep the costs down.
Good luck and happy rock bashing!