I don't have much of an appetite, so eating 4100 cals/day is very difficult for me. I'm following TBAB for macros (
To Be A Beast | Barbell Medicine), with a little more fat and a little less carbs than Jordan's template. I try to spread my macros across the day evenly. On a typical non-lifting day I do this:
Breakfast - 2-2.5 oz granola + lactaid (lactose intolerant) with 4 oz of juice. 1-2 oz of some tasty cereal (loving Fruity Pebbles right now) + lactaid. 1-2 oz of dried mango. 50g whey protein.
Lunch - Whatever left-overs I have in the fridge + 2-2.5 oz of granola/cereal + dried mango/candy/chocolate/nuts/seeds + whey protein as my macros need for that meal.
Dinner - Whatever my wife makes for dinner + cereal/nuts/seeds + whey protein as my macros need.
2nd Dinner - Costco Tamales/hashbrowns/breakfast tacos/whatever sounds tasty + cereal/nuts/seeds + whey protein as my macros need.
As you can see, I eat a lot of the same things throughout the day. Right now I always have Cliff bars, pumpkin seeds, almonds, pistachios, tortilla chips, jasmine rice, bacon, sweet cereal, granola, dried mango, and chocolate on hand. Try to find things that you think are tasty and quick to make, and eat those once you start getting the full signal. I can always put down 2.2 oz of Fruity Pebbles and lactaid.
If you are really struggling to eat, drink your calories instead. Drink milk/lactaid after every meal, like 2 cups. Try to get most of your calories from food if you can though. Also, be consistent with you calories and tracking them. Don't binge one day, feel awful, and then not eat enough the next day. Figure out what makes you feel sick/full. For me, I can't eat eggs, oatmeal, brown rice, and tons of wheat in one sitting (eg bagels + wheat cereal + toast) without feeling full/sick for hours on end. I try to eat breakfast at 9 (no appetite before 9...), lunch at 1, dinner at 5, and 2nd dinner at 9. Good spacing for meals.
At your body weight, I'd shoot for 2lb/week of weight gain.
EDIT - Hey Brodie, do you have a "I gained 100lbs, ask me how" t-shirt? I want one once I hit 230lb.