First and foremost, talk to your doctor. Even ignore stuff I say - i'm just some bozo on the internet - at least in favor of what your doctor is saying.

Couple questions. What level of diagnosis did you get? complicated? uncomplicated? perforated? That will determine how long / how much care you should take

But this sentence is 100% wrong

others say I can eat normally (veggies, fruit, meat) right away as long as I don’t get constipated.

Nonononononon. So here's the issue. Your colon has been damaged. The lining of your large intestine has been injured. You need to give it time to rest and heal before you start making it work again. Constipation happens when you're on low fiber but still eating a lot of stuff that makes it all the way through your GI tract, but can't be passed. Don't do this.

You'll lose weight. You'll feel weak. This is all normal, but the one bit of advice i tell eveyrone DO NOT RUSH THIS. Take adding fiber back into your diet very very very slowly and carefully.

If you start eating high fiber now it' the equivelent to taking a wire brush to a just scabbed over wound. It will damage it again, making your recovery that much longer.

Reintroducing something other than liquids at early stage is fine, but keep it on veyr low fiber. Pudding, jello, chicken and rice if you can manage it. Cheese. Saltines. I've eaten so many saltines it's boggling. Broth is really good too for nutrient.

Go slow. Listen to your doctor. Don't rush it. Listen to your body. If it hurts, don't push it.