@qe8nj8y08esy I'm glad to help and also that that tutorial is useful.
For gameplay, you absolutely do not need to use laptop mode. That setting is for computers with very low-end hardware, and you might notice some graphical anomalies if you keep using it. Instead, make sure the laptop can cool itself properly. Play on a hard flat surface, like a desk or laptop tray; the fans should take care of the rest. You will hear some noise, that's normal, but as long as it's not too loud, don't worry about it.
If you want to check for overheating, open the Task Manager's Performance tab and have a look at the GPU temperatures. You'll probably see two, one for the Intel integrated graphics chip and one for the Nvidia card. Neither should get over 80º C; let me know if either one is close or above that mark.
For processor temperatures, you'd need to download an outside tool. I prefer hwinfo (it's free), which shows a LOT of data, but I like how comprehensive it is. The CPU can get into the low 90s without there being any cause for concern. You can also get more accurate readings for the GPUs, including the hotspot temperature, which could be in the low 80s without problems.
I'm not saying you absolutely need to do anything here, especially if you're not seeing performance issues or any other sign of trouble. But for your own peace of mind, it might be worth taking a few minutes to see what you get.
The fastest way to bring temperatures down, at least on a computer with a working cooling solution, is to lower the in-game framerates. The idea is to limit the fps to the refresh rate of your screen, so probably 60, 120, or 144 Hz, rather than letting the GPU generate as many frames as it wants. This lowers the workload for both the GPU and the CPU, which in turn lowers the tempratures.
When playing in fullscreen mode, you can accomplish this by enabling vertical sync in the game's graphics options. For windowed mode, there are a couple other approaches that don't involve installing an outside tool. Let me know if you'd like more information.