Yesterday I went to for a swim.

Last Saturday night my friend and I stayed up late watching TV, and eating popcorn, in at my house; it was such fun so funny,. We saw watched 'Maleficent'.  On Sunday morning we woke up quite late, at 9:00am.

(new paragraph - change of idea)

I live in Nicaragua and the weather is so very hot because it is summer now. so My friend and I were both so hot.  (too many 'so's) We were/had been talking about many things, and when suddenly we decided to go swimming. She invited her sister and we all went to Dipilto It which is a town near the place where I live. We wanted to go to a swimming pool but there was were too many people there, so we went to the river instead, and we had a lot of fun a lot.

Pay attention to sentence structure and punctuation - particularly capital letters on names and to begin a sentence.

Yesterday I went swimming.

Last Saturday night my friend and I stayed up late watching tv and eating popcorn in my house.  It was so funny, we saw Maleficent.
On Sunday morning we woke up at 9:00 am.  I live in Nicaragua and the weather is so hot because it's summer so my friend and I were so hot.  We were talking about many things and suddenly we decided to go swimming.  She invited her sister and we went to Dipilto, it is a town near the place I live.  We wanted to go to a pool but there were many pople there so we went to the river and we had a lot of fun.