Did the meter stand up on it's own in that thick broth? lol
If you use an RO filter you probably want a prefilter to knock down the PPM before it hits your RO sediment filter. A large sediment filter before the RO filter will probably save you from changing the RO pre filters as often. Of course you would have to replace the pre-filter on occasion but if you get a large one it will go longer between changes.
With RO filtration you really need some pressure. The difference is huge, like if you are at 40 PSI compared to 70 PSI it might take 4x as long to produce a given amount of filtered water AND low PSI increases the amount of water wasted as brine to produce that filtered water. In most cases, folks with well water will require a booster pump on the RO filter input.
If you do want to get into filtering the well water I highly recommend contacting
WECO. They can help you design the best system for your situation. If I had water that hard I would want a whole house filtration system honestly but they are costly. I bet you get a lot of buildup on shower heads and such. I remember helping my dad replace the old galvanized iron water pipes in his old farm house. Cutting a one inch ID pipe would reveal buildup that only left about 3/16 inch opening through the pipe. Talk about clogged arteries lol, house needed a quadruple bypass. New PEX water distribution lines eliminated the potential for future calcium buildups in the pipes.