Any suggestions would be helpful~ Please and thank you!

Well, the easiest way to do that on Subeta is probably to buy the or the Jazz Age box from the RD shop, haha.

But if you want to make it out of separates, what you want is probably a bob haircut, especially one with bangs and/or finger waves -- the is a good one if you like the platinum blonde look. A cloche hat (they have some at Icy Goods) or a headband (one that goes around the forehead; the New Year's store had a couple) is a very twenties look. For the dress, you want one with a very simple silhouette -- straight lines, maybe some pleating, fringe, or sequins. Outside of the one in the Mysterious Bottle I don't really have any suggestions there; hopefully someone else has a good idea. Knee-length stockings and a pair of t-strap heels (ie, ones that have a strap up the front and around the ankle). I don't know if there is a pair of those on Subeta; if there isn't, look for a pointed toe. For a shirt-and-skirt look, you want a straight skirt and a shirt with a big collar, probably with a sweater over it. Fur is also a thing you can layer over these kinds of outfits. Any coat you wear should be fairly long. You can wear long gloves with this sort of look too.

If you want to do a more "evening gown" look, you want something with a longer skirt, but still with the simple silhouette. Twenties evening gowns were more embellished with beads or sequins than a day dress, so you can go with something a little flashier if you go this way. They also had longer sleeves, usually big and flowing.

For makeup, you want red lipstick and dark-but-not-huge makeup for your eyes (the ones you have on now are pretty good) and a very pale complexion. Jewellery should either be very simple (a long strand of pearls is a good choice) or very art deco (geometric shapes, lots of sparkle).

Pattern-wise, you can do plaids if you can find a skirt long enough or typical "ugly sweater" patterns in separates, but dresses had more subtle patterning in the fabric or just in the decorations sewn on.

Sorry I can't point out more examples of Subeta pieces, but I'm not too well-versed in the women's clothing on here; I'm just a big inter-war period buff so I wanted to help out. Good luck!