One thing to do to get some
One thing to do to get some ideas are the many books on the subject from building bench work to designing layouts in general. I notice that you are in O scale and planning on some industrial areas. One book for the basics that should be in your library is the text track planning for realistic operation by John Armstrong. There are also lots of others that deal with shelf layouts. In your case it likely does not matter what scale they are in you just need to realize you will likely need twice as much space as any plan drawn in HO scale and 4 times as much as any drawn in N scale. Keep in mind your ability to reach things will not be changed and will likely be about a maximum of 30 inches.
Biggest thing you can do for yourself is to finish your layout space completely before you do anything else. It will never be easier to work on and while those projects don't get the layout built you will have time to begin to learn answers to the questions you know about now and the ones that come up later that you didn't know you needed to know.
As to figuring out basic skill sets to do what you want the back issues are a tremendous source of info as are the blogs on this site.
Below is Nick's O scale blog.
http://model-railroad-hobbyist.com/node/22381
One of Paul's excellent entries on developing and building a layout although this is in HO scale it shows the process of design and development and construction that you might find helpful.
http://model-railroad-hobbyist.com/node/18971
Jim Six also has some excellent concepts covered in his Blog and addresses the concept of trying to put too much into your space. Interestingly his track plan is such that it could likely be built in a larger scale in likely the same space or very near to it. There is lot's to take away from his blog.
http://model-railroad-hobbyist.com/node/14150
Eric Hansmann has some great material on here in his blog and his frequent posts. He is building what many would call a small to medium industrial layout and does some great work in that regard.
http://designbuildop.hansmanns.org/
He also has some nice info on building his layout and his freight cars and locomotives.
http://model-railroad-hobbyist.com/node/18696
I also have some blogs you might find enjoyable that deal with the club layout and researching the past so you can model something that was or free lance based on some reality to achieve your goals. There are lots of construction on the infrastructure of the building as well as actual layout work and the humor that goes along with it in th club blog. Mine are listed at the bottom in my signature and there is a link to my clubs web site that you also might find entertaining and informative.
Now there are many, many more that you could look into and it would not take much for me to come up with at least another dozen that would fit the bill for things you really need to learn about building a model railroad. But I'll leave you with these for now and hope you are not overwhelmed or buried in information.
The idea is to provide you with useful info before you have painted yourself into a corner or built a sailboat in your basement.