No problem at all, hope it helped
If you are going at it freelance style then it really doesn't matter what you use as long as the result will be good. Yeah, clients might send you Revit files for this, SKP for that, DWG for something else but in the end you'll probably convert it into an app that you're most comfortable with. I think thats how most of us do it anyway...
If you'd like to work in a studio then things might be a little more complicated. Studios have established pipelines that you need to fit in, not the other way around. That means if a studio uses 3ds max or Cinema 4D + Corona renderer + PS then thats more or less what you need to bring to the table. That is usually true for bigger studios while the smaller ones can be more adaptive and can actually (in some cases) benefit from people using different software but as long as it fits into the general pipeline.
Lighting wise, even with C4Ds built in renderer you can afford to think like a photographer. You should get acquainted with GI and from there on forward its putting theory into practice. With the advent of PBR renderers (Physically based rendering) you are actually "forced" to think solely like a photographer as old school 3D lighting tricks aren't even applicable anymore - that is for the most part at least.
The point is that when doing arch viz you will learn to think like you are out there on the field with the exception that you can bend the rules to whatever you see fit. Softboxes, extra lighting and all that comes into play more or less like it would in real life.
I'd actually look into How To tutorials (Ronen Bekerman's website etc...) and start some courses (Digital Tutors, SOA...) if you feel like you're really confused about it.
In general though, I'd recommend that every artist dabble into a different software than the one he is using only just to see how things work. It can apply to C4D 3ds Max Modo or V-Ray Corona Physical Renderer... It is hard to grasp it when you are starting out but if you do check how your workflow works in a competing software product you might just have a better sense of the general 3D process and how, taking into the account the pros and cons of specifc software, it mostly comes down to you as an artist. Do this once you become really good and super comfortable in your favorite app first though