People living in chalets/chalet style houses, how do you combat the heat? I’m dying over here

I just moved into a new apartment in the beginning of this week. It’s a chalet I believe, it looks like the stereotypical Swiss homes and it’s a duplex. Well my room is on the top floor and it’s so incredibly hot up there, I just can’t stand it. I have all radiators off in all rooms (bedroom, bathroom & second room), I also leave two windows fully open in the room all day and it’s still so warm tho at least it’s a regular warm temperature. I think one of the issues is that the house has so many windows and they’re all pretty damn big, in my room alone there’s like 10 windows and the sun hits my house everyday all day since I live in the sunniest part of Switzerland. For now the heat is still somewhat bearable and manageable since the air outside is so cold but I fear spring and summer since the air outside will be so hot too so opening the windows will probably just make things worse, idk if I’ll survive the heat I already know it’s definitely gonna be over 30°C in the upper floor.

How do yall combat the heat? I’ve been looking at AC units but they’re so out of my budget currently plus since I have more window than walls it seems pretty impossible to set up and a fan can only do so much since it doesn’t actually cool the air at all. What can I do? Is there any products that work that are not AC units? I’m so in love with my new place but I fear I’ll regret living there around march.