Present aperfect Simple vs Past Simple

My family-------here for many years.

I ---------since I --------- a baby

I--------how to swimm before I--------walking

At 16 I --------a part-time job as a swimmimg instructor.

It --- a great fun teaching kids how to swim.

Something I------- to do is learn how to windsurf.

Last month I ----- to start taking lessons

I -------for a year now

I ------- up enough money to buy a windsurfing board.

I -------to London before.

At the age of 16 I------ my first medal

I------ this lovely dog for two years.