I am not the best writer, but I will try to give you some advice.
Although some people prefer to have lunch at the restaurants but I prefer to eat at home.
Although some people prefer to have lunch at restaurants, I prefer to eat at home.
When you go to the restaurant
When you go to a restaurant
You also need to capatilize "you" at the begining of your fourth sentence.
In addition when you are eating out you don't aware of the ingredients that you are eating maybe some dirty vegetables or spoiled fruits in your meal, but when you are making the food yourself you are sure that you are eating a healthy food.
This sentence is confusing and should be reworded. You could say, In addition, when you are eating out you are not aware of the quality of the ingredients. You may be eating dirty vegetables or spoild fruits in your meal. However, when you make the food yourself you are sure that you are eating healthy food.
Besides fast foods are usually full of fat and calories which are harmful for our healthy and make us gain weight and become fat.
Besides, fast foods are usually full of fat and calories, which are harmful for our health and make us fat.
You do not need to say "gain weight and become fat" if you become fat it is obvious that you have gained weight.
By using new baking tools such as microwaves you can cook the meal in couple of minutes, but if you want to eat out you should drive the car to the restaurant if you are lucky and don't stick in traffic it's about 15 minutes and you have to spend time for ordering the food and waiting 20 minutes in average for preparation of your order.
This sentence just keeps running on. You should reword it and make it more than one sentence.
Finally beside the reasons I explained for eating out making food is a hobby for me and I really enjoy cooking In conclusion eating home is much better for me than going to the restaurant wasting time and money and eating unhealthy food.
Finally, making food is a hobby for me, and I really enjoy cooking. In conclusion, eating at home is much better for me than going to a restaurant, which is a waste of my time and money.
I hope this helps, and gets you a good start on your final draft.