With a franchise that has been around for about 22 years and has around 20 installments, getting overwhelmed by the complex controls is totally normal.
Nonetheless, the creator of this website has played the games--for a good chunk of those 22 years and has a good idea of how to ease into the plethora of the game's commands. This page is dedicated to other factors that are not included in the homepage, but are important, in any case, and might interest you as you keep on playing.
More About the Controls
It should go without saying that the controls that are focused on here are the ones pertaining to the Playstation 4 and 5. As a player that has always played the main installments on Playstation consoles, it is what I know best. I understand that I am excluding the controls of the Xbox, Nintendo Switch, and PC versions. If you feel the need to go more into depth of other consoles' controls, I have included a link to Activision's website in the "Resources" tab. A more formal command list of the Playstation controls will be there as well.
More About Gaps
Gaps are not only super fun to find, but can help you rack your points up whenever you tie them into your combo! A guide to all of the game's gaps are in the Resources tab.
It should also be mentioned that gaps are not just possible through air transfers, but also through manualing various surfaces and grinding certain rails.
For example, grinding the entirity of this rail in the Warehouse will garner you more points than any other regular ledge