I don't think using the force is the same as Ki, chakra or similar abilities. Those are inner energy, typically, while the force is a living energy that is activated/used by use of microscopic organisms. Think of the force like the macielia (spelling?) network of mushrooms.. a great network that connects many other organisms, usually for beneficial effects for all involved. However some of those plants connected could actually be harmful and use the network for their own benefit while harming others (dark side force). The network will work to remove the bad (bring balance by destroying the dark force). Sometimes it'll destroy/fight the good ignition perceives coming trouble like killing a few health plants that could restrict proper health of others later (allowing the light side to retreat for a while, like Yoda and obi wan learning force techniques to become force ghosts, after a harmful organism aka darkside tricked force aka the clone wars).
If that makes any sense. So.. in theory, Goku could have midiclorians as all living beings according to star wars do, but they could be incredibly low, or his connection to them is cut off by focusing on his ki.
Which raises the question of if things like the midiclorians are supposed to be in all living things in star wars, does that apply outside that fiction, and will other things from other fictional verses affect others that are similar?.
Edit
Goku could possibly learn to create a Ki power that is similar to a force power like shoot lightning or redirect blaster bolts.. think he can deflect energy blasts any way. And if what he uses is similar to ki that naruto uses, he could learn those, given proper training or similar skills to help copy or approximate
