Hi everyone!

Ive been in Zürich for about 1 1/2 year now, working in an Architecture studio. I am a designer and now would like to create my own studio.
I have been reading alot around in the forum but just need some extra advice
I have an L permit and I am from Sweden. (I live my boyfriend who has a permanat contract with a B permit).

Now what would be the best way for me to create my own studio? I already have my business plan more or less finished. But I have no clients in Switzerland yet, I do have some possible ones in Sweden.

I am a little bit lost in all the freelance/einzelfirmas/gmbh/ag/permits/etc
What do yoiu think would be the best way for me to do this?
And if it is even possible for me, cause I only have an L-permit?

Thank you so much for you answers!