I haven �t checked properly, however, I noticed THIS sentence straight away:
I also like going on holidays in the summer to other countries.
I think the correct word order would be like this:
I also like going on holidays to other countries in the summer.
Moreover, I have some minor corrections for the following sentence:
I am a good student and I like reading and writing stories but I love going on holiday in summer.
My version would be like this:
I am a good student and I like reading and writing stories, but I also love going on holidays in the summer.
In the next sentence I personally would change the word order again:
My sisters are older than me but we play a lot together.
My sisters are older than me, but we play together a lot.