You have quite a ways to go with testing before you'll be ready to sell anything. Pick a wax, a variety of wicks and some fragrance oils you'd like to test. You may want to start with smaller jars, maybe 10 lbs. of wax and go from there. You'll need to test every FO in your candles and you may find the same wick doesn't work for all the different FO's. I wouldn't start with more than 5 FO's till you perfect them and I would buy in at least 4 oz. quantities so you have enough for more than one test.
Before you sell anything, make sure you have your liability insurance in place. You need to cover yourself just in case there is a problem with one of your candles causing a problem.
Have fun!!