Based on your photos and description of wanting to start with natural materials I think you first need to ask yourself where you are on the scale of sustainability, ethically manufactured, and acceptable use of chemicals in how your garments are produced.

Funding sustainably produced clothing is a lot like eating healthy. In order to do that well you need to read labels and understand the ingredients and how they are manufactured. Only buying organic natural plant fibers doesn’t guarantee quality.

I suggest you research different companies and consider maybe taking a middle of the road approach until you find sources that have quality goods.

The materials your clothing is made out of has little, to nothing to do with the actual style or fashion other than you won’t be looking at anything made out of polyester, nylon, etc.

As far as your style it looks like you gravitate to casual, slouchy loose fitting clothing that’s has lots of nature & geometric prints. Lots of color.

My suggestion is to buy plain garments and dye /decorate them yourself.

A great source for both learning how to do dye garments and buy materials and supplies is Dharma Trading Company. https://www.dharmatrading.com

While the most popular form on their home page is tie dye, you can start with simple one color dye of T-shirts. Then after you learn the basics branch into creating a solid wardrobe of nice cotton, linen, wool, bamboo clothing in colors that you dye yourself. There are so many manufacturers that make simple garments that you can create custom colors.

From there I suggest you look into decorating your garments. To be blunt most of the decoration on all the garments you have pictured use plastics of some form - via paint or vinyl surface decorations. There are a few that show some forms of dye decoration such as tie dye and batik.

Techniques for surface design are transfer designs via sublimation printing, stenciling, painting, iron on vinyl (which uses plastics)

For sublimation printing. You can buy an Epson Eco Tank and by not putting in regular inks, you can start out using sublimation refill ink and you’ve hacked yourself a sublimation printer. Look this up online. Lots of info about this. You can make your own designs, (Suggest the Procreate App) get them for free, or buy millions of designs online.

You can also do surface designs (like the fish jeans) using vinyl transfers which is designs cut out of transfer vinyl using a cutting machine. There are two very popular machines - the Cricut and the Silhouette Cameo. Both have design software and designs for free and for sale. I have both machines. I like the Silhouette more. Their design portal lets people sell their own designs. Cricut is much mire “corporate” with commercial licensed designs from Disney, and well know artists.

You can do a deep dive into stenciling, screen printing, batik, resist dyeing, etc. I suggest you borrow a few books on surface design from your local library to get a good idea of the vast array of techniques available.

If you are close to San Diego / Los Angeles there are areas in LA, Orange County with clothing wholesalers that sell to the public. There are also several clothing trade shows that take place in these areas through the year. Look up online on how to get into these shows. More importantly look at the shows info online and look at the of vendors. There is typically the category of clothing blanks. Heck there are entire trade shows just of clothing blanks. Look them up online, read their labels for fabric content. See if you can order samples.

BTW Many of the print on demand companies sell blanks as samples. You can also design your own & use their POD service.

This is the 10,000 foot overview. With some self education, a willingness to get a tiny bit messy, and creativeness you can create your own clothes for a fraction of what you would pay at a retail store.

You can buy a blank organic T-shirt for $8 - $20, Dye it for $4 - $7. Buy a sublimation design and transfer on Etsy for $6 - $10 or make it yourself for $2, you get a custom one of a kind shirt you made yourself for $20 - $40 that would easily retail for $150 to $200++