Building my first Woody!

So I'm in the planning stages of my first woody and am looking for some guidance from the experts. I kept running across this forum through my google searches so thought I'd join and just ask the questions directly. I apologize I don't have a picture because I was struggling to find software that could do what I want quickly and easily (suggestions?)

I've got a 14' long x 8' tall wall (after duct work, it's actually 9' before) I am planning to start building on in my unfinished basement. I am thinking about having a 4' section (section #1) either vertical or slightly pitched towards section #2. Section #2 will be 2' kickboard, 2' 45 degree angle, 2' vertical, 2' 45 degree angle (up/out/up/out) for total of 8' high x 6' wide at top. Section 3 still tbd.

All this said, I'm trying to decide what kind of boards I need to make this out of (2x6, 2x8, 2x10) based on the Metolius article I couldn't decide which was right. Also, when framing do I use the 2x for ALL parts of the framing process or just the ones angled outward? I wanted to assume all but figured it was worth asking.

Any thoughts on the above plans and suggestions? Please know I have gone indoor rock climbing about a dozen times in my life and loved it which is why I'm trying to make a more serious investment in a personal facility. I want something that will be difficult for the long term and versitile enough that it wont get boring quickly.

Any other thoughts or suggestions please throw them here and I will try to post some pictures of the space in the near future. Thanks in advance for your help!