Someone can me Please will someone correct this text. thanks!

The Next weekend, we are going to celebrate my sister's birthday. It Wwill be a surprise party. First, sSome of my friends will decorate my parents's house and another other friends will buy snacks, beers, sandwiches, olives and a huge cheesecake. Is It's your favorite!.
I have bought her a pretty watch and one pink pijamas. Her best friend haves invited her to travel to Spain at in the summer. In Spain there are many beautiful beachs and the mediterranean food is fantastic.

Pretty good, but there are a few grammatical erros. When ever you use a punction mark ". , ? ! ; :" you must put a space after it! It makes you English look so much better and it's an easy problem to fix. Keep up the good work! :)

Someone Can you please me correct this text? Thanks!

The Next weekend,_we are going to celebrate my sister's birthday.__It will be a surprise party.__First, Some friends will help decorate my parents's house and another friends some will go and get buy snacks, beers, sandwiches,_olives and a huge cheesecake which is your her favorite!.

I have bought her a pretty watch and one a pink pyjama. Her best friend have had invited her to travel to Spain at the in summer.__In Spain, there are many beautiful beachs and the Mediterranean food is fantastic.