Struggling to know what would be the best way to get further into sustainable fashion

I'm going to admit: I wasn't actively trying to find sustainable fashion until the start of this year. Yeah, I avoided Primark and have never bought Shein or similar sites like that. But never actively bought sustainable fashion. I thought it was too hard to find brands, until I realized that it wasnt super difficult, just had to look at what is available and around.

Now I have quite some pieces that are sustainable and also fairly made from a local store. They have a small section of clothes. I checked their labels/certificates and it looks good. I live in a small town and it takes long to get to the closest shopping mall/clothes store. So pretty much everyone buys their clothes online.

But now that store is getting rid of their clothes section.

So, I'm kind of stuck on what I could best do. I have a few options, but have some questions and notes about them too.

Making my own clothes

I've been thinking about this for a while. But the thing is: I need skill and money and time investment. And I don't really have either of those.

And if I were to make specific things myself (tops for example), how can I make sure the fabrics I use are sustainable and made fair? How can I check for this?

Vinted

This is something I see alot of people do, both online and IRL. But one of the things I'm kind of struggling with is the shipping. Most of it is shipped with just national delivery/post services. And those just aren't great emission wise. I generally try to avoid ordering things where I can. How bad really is it?

Ordering clothes from certified sustainable/fair brands

The thing I'm struggling with for this one would be the fact that on one hand I try to find sustainable and fair clothing, but then do have it shipped to me, which is bad for the environment. But does it make up? Or is it still better?

Are there any other options? What would be the best? Sorry if I didn't explain things greatly, English isnt my first language, sorry