plz help english garmmer ~ thx

Children should study and growth under the environment of love.
→Children should learn and grow in love.

I love kid very much and I have sincere to the teaching.
→I love children very much and I have the sincerity needed to teach them.

I thought that my character is suitable for this position that is the reason for why I applying this position.
→I believe that my personality is suitable for this position, and this is the reason why I have decided to send in my application.


Cheers!

Children should study and grow in a loving environment.
I love children very much and I am passionate about teaching.
I think my personality is suitable for this position, thus my reason for applying.

Good luck!