Work on a structured programme that suits your requirements.
Body weight exercises would be far more suitable than weighted alternatives.
However, if you work on squats, pull ups and press ups, you wont go far wrong.

U ASKED WRONG QUESTION WHY?, SWIMMING IS THE GAME OF SPEED U NEED FOR SPEED OK I JUSTIFY MY WORDS BY USING AN EXAMPLE WORLDS MOST STRONGEST PERSON IS NOT A SWIMMER, FLAPES IS VERY FAST, KEEN AND FLEXIBLE THATS WHY HE IS GOLD MEDALIST IN OLYMPICS UR JUST ON TEN SO U HAVE LOTS OF TIME U MOST FOCUSSED OBOVE 3 POINTS AND START PRACTICE.AND TAKE A PROPER DIET AS UR GAME.