It seems a bit messy so it might be good to organized your ideas. The main idea you need to develop is why baseball is your favourite sport.
Introduction: you can talk about baseball in general providing relevant information about this sport.
"(in my opinion ) b<span>aseball is a great form of getting into shape and also enjoying fresh air and even socializing as it is a team sport". This might be your thesis statement. so in the following paragraphs you are going to develop and expand each of this characteristics.
paragraph 1. get into shape. describe/ provide information/ explain why?
paragraph 2: fresh air
paragraph 3: socializing.
Conclusion: remember that in the conclusion you should not provide new information, this is just an enumeration of what you stated. So you might say "in conclusion/to conclude, Baseball is my favourite sport because ...." and you state again all the ideas already mentioned. </span><span />
