I'm in my mid fifties and did this. You almost certainly don't have physical limitations that are keeping you from getting 25 hand cannon kills in the next two weeks. You may have addressable issues such as lack of experience, lack of knowledge, etc. You can do this with some effort. Here are some thoughts... Go watch some PVP hand cannon videos on YouTube. This will give you the idea of how to play with a hand cannon. Pick a good hand cannon and stick with it. Crimson (with catalyst would make this easy), Dire Promise, Spare Rations, etc. You can even use 180's. You might even try one with rampage or kill clip to make this a little easier. Crimson is probably the easy mode option if you don't have a lot of hand cannon experience. Use the right build. Use precision targeting mod(s), hand cannon re-loader, hand cannon dexterity, etc. This isn't necessary, but it doesn't hurt. Since you are struggling with 1v1...follow teammates around and steal kills/shoot who they are shooting. Get head shots. Since you'll be shooting targets that have already taken damage, this could help Commit to hand cannons. Don't give up and play most of every match with an AR or Witherhoard or whatever. Use your hand cannon. Make sure your sensitivity isn't too high. Now is not the time to play shotgun ape on maximum sensitivity. You can do it. Even if you get 1 kill per match, at 4 matches per hour that's between 6 and 7 hours. At two per match it is around 3 hours. You can easily do this in a day or two.