Being on the wrong side of 50 and overweight, I don't expect to be much good competing in sports against guys half my age. I regularly play tennis against hot shots in their 20s.
The number of times I win is amazing and extremely gratifying! The fit young big hitters have excellent court coverage abilities but sometimes overhit or get frustrated with themselves. My skills I suppose would be good placement of shots, consistency and reasonable power on forehand when I get a clean opportunity to hit hard. Although overweight I've some sort of basic fitness and can last through long matches (but taking longer to recover between long points!).
It's good to know one is not totally past it in an energetic sport after half a century on the planet. I wish I had taken up tennis seriously in my teens. I was almost 40 when I started playing in any proper way. I would encourage everyone to enjoy some sport and start as young as possible - but certainly don't be discouraged by starting when older.