It should say more than just my fathers beetle. It needs to have predicate, i think.
Gardening is good for using muscle in your body. The arms, legs, back, neck, etc. doing these tasks build muscle and burn calories.
"i" and "i'm" must ALWAYS be capitalized, no matter where they are in the sentence. So, instead of "i" and "i'm," you would say, "I" and "I'm."
Because I dont know I havent read that book