The main thing is the Nvidia drivers. Once you install, as long as you are on hybrid graphics, meaning you have both the onboard and Nvidia turned on, you will go right into Solus without any issue. Go ahead and update Solus. When you reboot, install the Nvidia Open drivers. You can use Solseek and go down to the Driver section, as it will pick the drivers for you.
Once you install, reboot, and test with nvidia-smi if it launches and shows info, you are golden on that side.
In the past, you would need to do more steps, but now we have very recently added lenovo-legion-linux in the repository, which brings additional drivers and tools. Install that, and you should be good.
