Hi Jacopo,
You might give one of these sketch albums from Moleskine a try – the paper is thicker which limits bleed-through. They used to offer a hard-cover version of the thick-paged notebook, but I haven’t been able to find that lately.
I’ve been enjoying Strathmore notebooks too – here’s one that might be a good fit. They’ve got spiral-bound versions too if you’d prefer that.
One thing to pay attention to when looking at notebooks is the weight of the paper – that tells you how thick it is (80lb and above seems to be a good thickness that prevents bleed-through).
Hope that helps!