Since I cut a bit longer now and my current laptop is not enough for davinci resolve I'm looking for a cheap laptop
Max: 350 euro
Which laptop do you currently have in particular in terms of the included CPU and the graphics processor and amount of RAM? Does your current Lappi still have an HDD, or already an SSD?
There you should look for used goods. I think for 350 euro you get older CPU a i5 the third / fourth generation or a i7 second generation. This could work, even if it does not run smoothly.
I do not remember the pages though. You have to google it.
Video editing and 350 euro? Maybe forgot a 1 before the price?