I was a lot like that a while ago, I knew nothing about food or exercise and I was depressed, I gained weight and hated my body. I was so afraid to even start my transition because of how disgusting I thought I looked and just assumed my transition would be a failure.
Keep in mind, these days, it's not uncommon for women to have poor body image.
But I realised that you can do a lot to build the body you want, I guess thats why they call it "bodybuilding".
I've talked a lot about exercise, and that alone can go a long way to improve your body, your self image and mood. Once you start seeing some progress towards your goal, it starts to feel real good.
But I'll talk a little about food now:
AVOID FRUCTOSE LIKE THE PLAGUE. This stuff is poison, it is in a lot of processed foods and is usually labeled "sugar" or "cane sugar". It directly metabolizes directly into fat and bypasses your glycogen banks. This alone can have a huge impact on your mood and eating habits.
"Clean" bulking is pretty much just this, avoiding dirty foods.
Use a site like
calorieking.com to see the cals and sugar content of foods you eat, I've never really used a food scale, you can roughly guesstimate how much cals you eat and just try to stay under or over your target. Don't confuse carbohydrates with sugars, carbs are fine, even sugars are fine as long as it's like glucose (but this is very rare, so just try to avoid sugars in general).
If you are bulking, try to eat high cal density foods, peanut butter and whole egg mayo (don't get the low fat kind, they just replace fat with sugar, ends up worse, this is true for a lot of so called "low fat" stuff), are both tasty and simple products to increase your cal intake.
Eat a lot of meat, rice, pasta, dark green vegetables, wholemeal breads etc. for main meals. A simple dish I have a lot is broiled chicken breast, rice and brocolli (easy to cook just chuck the frozen vegetables and rice into a rice cooker), with some mustard if I'm cutting, or a whole bunch of whole egg mayo if I was bulking. Avoid high sugar condiments (bbq, tomato sauce, etc.).
After a few weeks, you'll be amazed how good it feels to eat properly! I hope this helps and good luck!