The mean net trader benefit of all options sells on the market is -2T%, where T is the average brokerage incurred for each options transaction.
A good options trader in the right market could probably achieve several hundred-fold increase on initial investment (in the order of 10,000%) in a given year, but would unlikely be able to sustain it for more than such a period. Long term (30 years+), the best options traders could probably hope for about 18%p.a. after fees (maybe a little more but I think 20% is definitely extreme).
The variance on that is huge, and as a beginner you could probably expect to lose anywhere between a few hundred bucks you invested or, if you for some reason convince yourself that uncovered options are a good idea, your house and left leg. Plus or minus a few million dollars of course (hey, you could get lucky!).