What version of SketchUp are you really using? Your profile says “Free Plan” Version 3 which isn’t possible. If you want useful advice please provide useful information in your profile. What rendering application are you using?
Have you read through the posts in the Computer Advice category here? I moved your post to that category for you.
First look inside your wallet. What is the price range? Within that range, you should look for a CPU with a good single core performance, and, if possible, a discrete GPU (I prefer Nvidia). Not less than 16 GB of memory, 32 if your models are big.
The price range of laptops in the store I often look at goes from something like 200 euros to near 6000 with more than 800 different models…
I would probably be looking for a “gaming” type laptop with discrete Nvidia graphics. Their price range seems to start from around 850 euros but perhaps spending a bit more would be in order.