Aww, you guys are so cute! I can't believe you worked with that fabric -- it looks insanely difficult.
I wish I could do larp (injuries and all, LOL) but my husband's insane work schedule wouldn't allow much time for it. Thinking about taking my kids to a jousting tournament this summer. We're Barony of Gyldenhall.
If you are a size 2, you're equivalent to approximately an 8 in modern patterns. Check your measurements. Also, your full bust measurement is the best measurement to follow for dress patterns, unless you are disproportionate on either the top or the bottom. BUT.....if you have less than a B cup and normal size shoulders, you need to use your high bust measurement instead. Wrap the tape around your torso under your armpits to get your high bust measurement.
Hope that helps. It can be confusing, but I doubt you are even close to too small for todays patterns.
I am a junior's large to extra large, a woman's medium, and I usually wear a man's small undershirt (v-necks because the crewnecks choke) to bed. So I think that as long as you cut out the neckline, a man's medium would work.
By the way, I've found plenty of unisex colored plain shirts at Michaels and Joanns.
It is hard to say. My primary craft is sewing -- I do other things as a hobby, including crochet, jewelry making and shrinky dinks. I try to limit what I spend on my "hobby" crafts because so much of it goes unused. I might spend $20 per month, a little more in the summer because the kids are home and join me in making stuff. I do spend about $10-30 per week on sewing stuff; it alternates between fabric and supplies. Right now I'm well-stocked on fabric, so focusing on patterns, thread, and notions. I also live relatively close to LA's Garment District, so I go on a shopping spree there about 1-3 times per year, spending $50-100 each time -- mostly on fabric.
In my experience, a pretty full but not too floofy tutu will take approximately 5-6 yards of fabric. For a sticking-straight-out tutu, you'll need closer to 10. Tulle for tutus is pretty cheap, so that shouldn't be too pricey. Don't get net -- it is scratchier and will irritate your skin.
I don't know about tutorials, but any instructions for a tiered skirt should work for a tutu. You can make the top tier from cotton (recommended for comfort) and put 2 to 3 more tiers of tulle on it. The tighter your gathers, the more your tutu will stick out.