A letter

Dear Mark,

Many thanks for your last letter. Your new job sounds very funny (Do you mean "funny" like a clown or a joke? Or "fun" as in something Mark really enjoys?), but when do you relax? I’m sorry I haven’t hadn't written sooner (this expresses the past-- you can write "I'm sorry I haven't written until now...") but I’m I've been very busy settling into (optional, but most often used here) my new house. There are a lot of things to do! for doing! Since I arrived to at my new house, I haven’t stopped doing tasks (In the U.S. we often say "chores" instead of "tasks."). Every day I have to buy something, either objects utensils for the cooking, objects for the living room, objects items for the bathroom or objects tools for the garden… It’s horrible! I wonder when it will finish end. ("Objects" is a very general term. You're referring to specific rooms so you should practice using more specific words for the "objects" in each room. For example, you could say "furniture for the living room" or "lamps" or "art.") 

That reminds me that I have to say tell you that I won’t be able to go to the farm this summer. for that reason. (It's OK, you're about to give the reason.) I have to be in house at home and in addition I also have to study for my exams (which are coming up) in September. (Most people say it as you have and it's, mmm, OK but, technically, it might sound as though you will study in September. Remember the prepositional phrases are "for my exams" and "in September." They are simply adding information. But if you take out "for my exams" you have "I also have to study in September." Not OK. Or you can just take off "in September.") then It’s impossible! (More comments: Is the reason you are staying at home because you need to study? Then you can simply say: "I have to stay at home and study for my exams which are coming up in September.")
Anyway, if you have more time than me I do, you could come to visit us and you will see my new house as well. The neighborhood and surroundings will like please you, I’m sure. Please write and tell me if you will come for preparing so that I may prepare your room.

Best wishes

Inma

Pretty good Inma! I'm sorry if I've created more confusion but, of course, much writing depends on meaning. Anyway, it's always fun to settle into a new home. Good luck!