I'm just a casual kettlebell user rather than a trainer or anything but the recommendations I see for adult males is always 16kg/35lbs. If you're completely untrained/weak then it might be better starting with a lower weight.
For a man a single pod (16kg) is a little on the light side unless you are doing lots of reps -I like to keep my kb workout at 100rep, it's quick and an easy number to remember. For swings I,like to use the 2 pod KB and then the 1.25/1.5's for snatches and cleans. You can also use the 2pod for farmers walks and TGUs. This assumes you have multiple KBs if not the 1pod is your best bet to start with and you'll know when it's time for heavier weights.
This is pretty good advice. I bought some adjustable ones. They're fairly expensive, but you can start with a lower weight and work your way up. You can also do other exercises at lower weights to work smaller muscles.
The kettlebell reddit (/r/kettlebell) is a very good place to learn from - lots of people helping each other get the technique right. Seems the most common mistake is "hinging too early" in the swing.
