That original look is a (camera-generated) jpeg embedded in the raw file. If you want that exact look, the best solution is to shoot in raw+jpeg (for a while, until you feel at ease with raw processing).
The raw data in themselves aren’t a visible image, there’s quite a bit of processing involved to generate a decent image (but most of that is automatic).
To see if there is a problem in your case, follow @apostel338 's suggestion and upload a raw file (with a proper CC license in the text, so we can show versions here)