Hello! I am newer to the sewing craft and hobby. I was wondering if you had any tips or thoughts on your favorite fabrics to use, qualities to look out for, and any other general tips you might want to give to a blooming designer. Most of my work is gonna be more whimsical and less historical, but that doesn't mean I can't use all the help and tips I can get going in! I will write down any valuable information you can give in my notes.
That is a VERY broad question and I don't really know how to answer without knowing more specifically what you're sewing!
I do 18th century menswear, and very 18th century inspired everyday clothing, but I have no idea what you're looking to make, so I don't know if we need the same fabrics.
Like, when I hear "more whimsical and less historical", for me that would be something like a tailored suit that looks like it's made of leaves, but for someone else it might be a big floofy ballgown.
But to answer the bit about my favourite fabrics - I prefer woven fabrics in natural fibres with no stretch. I use a lot of linen, cotton, wool, and some silk and rayon, with the weight and specific kind of fabric depending on what garment I'm making and what season it's for. Usually they're medium or heavy weight, with the exception of shirts.
My favourite thing for nightgowns is thrifted 100% cotton bedsheets, my favourite thing for shirts is lightweight linen, and I like making pants out of heavy cotton and jackets and waistcoats out of wool suiting, but there are lots more materials I've used for these things.
And there are people who like to sew with stretch knits, or who use a lot of shiny synthetics, or lightweight gauzy fabrics! There are tons of different kinds of fabric, and the ones that are best for you will depend on what kind of garments you're making, what kind of wear they'll get, and your budget.
(Though I will say that I'm a polyester & acrylic hater. Sometimes synthetics can be nice if you need something sparkly and shiny that can't be done with natural ones, and I do usually machine sew with poly thread, but polyester fabrics are often a Bad Texture and they don't breathe and I avoid wearing or working with them.)
One thing that might be helpful is going to your nearest fabric store and touching lots of fabric and reading the labels. It's not the same as actually sewing with them, but it should help you get a bit more familiar with the textures of various weaves/how much they fray/etc. (Also looking at the fibre content on the labels of your own clothing, even though these days far too many things are polyester, or some sort of blend, and there are lots of great fabrics people are missing out on.)
I'd also recommend Nicole Rudolph's videos on fabric - she's got ones on wool, silk, linen, cotton, and tailoring supplies, which ought to give you a good idea of the various qualities of those particular natural fibres.
Here's a link to my FAQ, which has some other sewing questions I've answered over the years.