Small informal letter (check please)

[katiekatie]

Dear Donald,
My name is Kate and I am glad that you have turned to me for my advice.
Firstly, you need to do logical tasks to improve your skills. If you want to be successful in languages you must learn the words. Memorizing words also improves your memory.
There are so many advantages of staying at school. For example, you learn a lot of new things that will be very important and useful to your life.
The most popular method of choosing career is visiting a career counselor. He or she will help you to find most suitable job for you.
Best wishes to you,
Kate

[foreverest]

As an old saying Practice makes perfect.

[luschen]

I am not an English teacher, but I can spot a few tiny errors:

Dear Donald,
My name is Kate and I am glad that you have turned to me for my advice.
Firstly, you need to do logical tasks to improve your skills. If you want to be successful in languages you must learn the words. Memorizing words also improves your memory.
There are so many advantages of[to] staying at school. For example, you learn a lot of new things that will be very important and useful to[in] your life.
The most popular method of choosing [a] career is visiting a career counselor. He or she will help you to find [the] most suitable job for you.
Best wishes to you,
Kate