New with UC and need help with my diet and some questions

Hello, I was diagnostic with mild UC just one week ago after they did the colonoscopy and didn't get a chance to speak with my gastrontorologist so I spoke with my family doctor and he started me with Mesalazine 800mg and I'm trying to get used to the diet but I have one week eating chicken,tuna, lettuce , jello, salmon, eggs, rice and bananas. Those are the things so far I found safe to eat. However I'm tired of looking online and all I can find is what not to eat. I believe I'm having a flare currently. I'd really like to know other people with my problem and some suggestions about more things that you might consider safe to eat besides the ones I just mention before, I know every person is different but I want to know what has worked for you and one more thing I'm wondering if drinking gatorade is bad because it has sugar on it? and are bread, lettuce and salt cookies bad? I know this is a lot of questions but I'm very confused,
Thank you. P.S. sorry for my bad english.

I can eat white bread, no wheat bread, but I don't have problems with gluten. I had to stop dairy. I think lettuce bothers me but I can tolerate a little spinach (raw, not cooked).
I feel best when I have fish and rice.
Creamy peanut butter is okay sometimes, other times it makes my mouth sore.
Applesauce or peeled apples. Potatoes, not the peeling,cooked green beans, cooked carrots.
It has taken me 2 years to get this far.
That's all I can think of right now.

Post Edited (Coffeencake) : 1/26/2014 9:55:14 PM (GMT-7)

No, if your Rx medication reduces the inflammation you will be able to resume a more normal diet before too long. Gatorade is not the best drink because most flavors contain artificial dyes. Read labels and try to stick with non-spicy, lowfat, minimally-processed foods for the time being. Jello usually has dye in it, too; you could make your own with unflavored gelatine + natural fruit juice, which is more nutritious. It's best to keep well-hydrated with plain water & gradually add back natural juices & non-carbonated, decaffeinated beverages as your UC symptoms improve. Plain-boiled white rice, broiled or baked poultry w/o skin, broiled fish, scrambled egg, mashed potato, egg noodles, applesauce, banana, avocado, and cooked veggies w/o seeds or thick skins usually can be tolerated. If you have multiple bms daily, it's best to avoid raw produce except for ripe banana. / Old Hat (33 yrs with left-sided UC; presently in remission taking brandname Colazal)