You're right, I was looking at the wrong link. To go back to the poster questions.
I am in the same situation, married to a UK citizen. In my case, I am still a step behind the poster as I am only now applying for my IRL. But, hopefully, if I am eventually approved, I will go through the same process so...
1. Can I apply now ( instead of year later) since I have ILR and am married to a Brit citizen and have lived in UK more than 5 years.
--Just to be clear what you are saying is as soon as I have my ILR approved, I can apply for British Citizenship.
2. Can I apply and still travel out of country after I submit my application.
--I would still have the same questions. If everything went well and there were no delays, there is a chance I get be approved for British Citizenship by next summer, but if not and I am still waiting, could I travel out of the country.
3. What is the key info I need.
--That appears to be in the link provided.
4. How long before hear back about application.
--Same
I would add, since I have already live in the UK for the past 5 years, it probably doesn't make much difference that I traveled out of the UK for 3 weeks a couple years ago. Just to be clear about the 3 year rule, is that correct? Thank you.