I am not beginner then. Thank you.
For me it is just normal helper verb with easy function that attach in almost 100% percent regular way to one of the stems of the verbs. Same with most other cases.
There are some weak points though to that approach. You have normal phonetical laziness in Japanese like for example this one https://bunpro.jp/grammar_points/74 and here it is easier for me to think about it as a conjugations of sort.
I choose precisely what makes it easier for me to understand. I did try Genki in past and Tae Kim. It does not work for me (Tae Kim is good if you keep in mind he is sometimes “wrong”).
It is programmatic approach. I don’t like studying Japanese. I want to use it asap. Studying it is just sad necessity.
Let assume that I am 100% wrong, and there is no way in hell you can understand it like that (very likely) without contradictions. I would still opt for it. I can study linguistic of Japanese after “mastering” it.
Japanese people as all people have not much clue how their language works. If they would know it there would be no need for researches: just ask native.
Similar approach to one propose here is working so far for me:
When it will stop working I will change it
I can’t wait to be able to somewhat read it. I plan to “master” grammar by studying this kind of books in Japanese.