practiced/exercised

[keannu]

I’ve played drums since (I was) a freshman in university.
As I wanted to play some musical instrument in a band, so I chose to play drums because it was the easiest to learn.
So I started to play drums , practiced/exercised very hard for one year, and came to be good at it.

Please let me know if the underlined parts are correct.

 

[tedmc]

1. since I was a freshman at university.
2. instruments in a band
3. practised very hard
4. became good at it

 

[keannu]

2. I wanted to choose one(some) "musical instrument", not a few ones.
3. What is the difference between "practise" and "exercise"?

1. since I was a freshman at university.
2. instruments in a band
3. practised very hard
4. became good at it

 

[tedmc]

2. I wanted to choose one(some) "musical instrument", not a few ones.
3. What is the difference between "practise" and "exercise"?

2. a/some(unknown) musical instrument
3. It is usually practise on a musical instrument

 

[Tarheel]

Perhaps:

I've played drums since I was a freshman in college. (In British English: at university.)

And:

As I wanted to play a musical instrument in a band, I chose to play drums (the easiest to learn).

And:

So I practised very hard for a year and got good at it.

We don't use exercise to mean practice.