The good news is that most mainstream Laptops will work with Linux following a standard install without any additional configuration. The more specialised or cutting edge devices may run into problems, particularly with high end graphics cards, newly introduced components or certain wireless adaptors. Some Laptops can be specified with Linux pre-installed and there are a few vendors who have developed their own equipment optimised for the Linux Operating System.
When choosing a Laptop for your Linux installation it is wise to do some homework and look for posts from users who have had experience with the devices that you are considering. Some Laptops may only work with a particular Linux distribution and others may require external or replacement wifi adaptors for instance. Generally speaking, the more popular and mainstream the machine you use, the more likely any issues will have been discovered, published and resolved.
Most manufacturers maintain a catalogue of equipment that is certified to work with Linux, or a particular Linux Distribution. I chose a Dell Laptop for my own use as Dell have offered Linux pre-installed on some of their hardware. They are not the only manufacturer to have done so. I have even managed to run Linux on a 2015 MacBook Pro!
Some Linux distributions are better than others at supporting Laptop specific features such as trackpads, touch screens and screen rotation and I have had good experience with Mint Linux and Ubuntu.