I’m here!
SW, you could try ordering the Strictly Curls book – it was advertised on this site but I think the ad is gone, so if you search for Strictly Curls you should be able to find it. It walks you through updos and so on.

Those styles you posted are way less complicated than the descriptions of how to do them! My suggestion is just to start practising daily when you have time so that when the dance comes, you know how to do them. Get a ton of bobby pins that match your hair, something that you can use to tie your hair up and hold it tightly without showing (I use a black pantyhose leg made into a bungee cord with large bobby pins) and a thin brastrap type headband that matches your hair. You can “cheat” by combing hair smooth and doing any part or lack of part you want, putting the headband on a few inches back from the hairline and smoothing the hairline running into the band with a brush, and now your hair is so much easier to put up. You can also use a colourful or glittery band for a tiara effect.

Then, when you put it up, do it in fairly small 1-2 inch sections. Just pull out sections randomly and pin – criss cross at least 2 bobby pins on the underside of the hair to hold it securely. Let them fall however they want – that’s the beauty of the type of style you posted. If you want more order, start at the nape of the neck, do all the hair there, and move forwards. You can twist sections before you pin them if you want. Leave a few tendrils out here and there. Then when all the hair is up, you can leave it natural, or define the loose ends with a curling iron.

The second style you posted is basically – put half your hair in a high ponytail and smooth the roots as much as you can (if you put it in 2 or 3 smaller sections first and then join those into a pony, it’s much easier) and then make a loop and pin at the top of the ponytail to give it extra height, and that’s it!

Good luck and have fun at the dance! Feel free to PM me or post here if you need more help.