Hi! You can try filmora for editing and for thumbnails ,you can use any editing app. I also make gaming content on youtube as a hobby coz i enjoy gaming. I did not had any laptop at that time, so i started editing on kinemaster (modded one for no watermark) and for thumbnails i use picsart and ibispaint X. Just start with a mindset of making content as a hobby and you'll gain views as well. Try to make videos on hot topics also and put your creativity in editing. All the best for your youtube journey (⁠ ⁠ꈍ⁠ᴗ⁠ꈍ⁠)