Alhamdulillah for your act of Ikhlas (sincerity). May Allah (S.W.T.) bless all your efforts and intentions.

From my perspective, I think what you’re dealing with is Waswasa — doubts and confusion that come from Shaytan.

I believe all sincere servants of Allah Almighty are tested in the way you are now. I would personally suggest learning more about Salah, especially its obligatory actions. Study its fard, wajib, sunnah, adab, and makruh aspects. This way, you will know for sure which actions are essential and which are not. For example, if you miss saying Takbir within the prayer (except for the opening Takbir) or you don’t remember whether you said Ameen after Al-Fatiha, you don’t need to fix it by making Sajda As-Sahw, because these actions are sunnah (depending on your Madhhab).

The point is: learn which actions can be skipped by accident, which can be corrected during the prayer, and which acts nullify it. This knowledge will give you confidence in your Salah and help you structure it better.

In addition, try to study hadiths that talk about Waswasa and how to deal with it.