How do I set up a Trust that my brother acting as my executor can distribute what I have to the people that I want to have it? How much does it cost?

I am a retired widow and have a small amount of insurance from the death of my husband, part of his SS and part of mine, 78 acres of land in Quincy that is nearly paid for, starting a business farm growing daylilies, irises, and dahlias among other items. My estate will be divided among my husband's 2 brothers with one of the brothers will have half of his portion distributed to his 2 adult children about 35 or 40%. A portion will go to my brother with a portion of his amount going to his 3 sons, and a portion will go to a woman who my parents tried to adopt to get her out of an abusive and alcoholic home. She was my best friend in junior high and is like a sister to me still after all these years. I have a friend that my husband and I love and would have adopted her. She should have a portion as well. I may have a friend who will be helping with my gardening farm, in which case I need to set up what she should get of that business. My animals will need care as well. I need help