I go by the conventional understanding that evolution means NO CREATOR, that evolution means simple cells evolve all by themselves -- without God -- into the millions of living species today.
That's your "conventional understanding", but it is in no way representative of what the actual theory says, nor what the majority of people who understand the theory believe.
And i disagree with this theory of evolution.
It's a fictitous strawman invented by you to tilt against. Of course you disagree with it.
Well, maybe he believes in a halfway evolution where there is god involvement... or he is still trying to figure out.
There are multiple versions of the belief of divine intervention into the otherwise naturalistic process of evolution. These are generally encompassed under the heading 'Theistic Evolution'.
Occams claim that some churches and individuals believe in evolution. Many? There are obviously a few minority churches who will say anything, everything -- and essentially nutthing.
According to 2019 polling by Pew Research, about 80% of US adults believe humans have evolved over time, and about 48% of the population believe God (or another higher power) was involved in the process. A mere 18% believe that humans were created in their present form.
So, far from being the view of a 'few minority churches', Theistic Evolution is the majority view of all major Christian denominations (Roman Catholic, Evangelical & White/Black Mainline Protestant) in the US.
There are also individuals who consider themselves advanced and scientific, but who can't even use basic science to explain how evolution happen at cellular level of living organism.
I have a basic university level education when it comes to evolutionary biology, but I don't see myself as qualified to offer anything apart from a very basic overview of evolution when it comes to a cellular level.
Asking laymen, or even non-specalist scientists, to explain "how evolution happen at cellular level of living organism" is like asking an airline passenger to explain how the flight control software works on a jumbo jet.
They think -- wrongly -- that creation is a naive myth but could only defend their 'scientific' theory with vague and general words. God's creation ls right before us and around us --- if people do not act blind, or do not try to separate the neurones that connect the eyes and brains.
If you want to research the scientific literature on evolutionary biology, or learn about evolution, there are more free resources to avail yourself of than could be consumed in a lifetime.
Harvard, Yale, Duke, Wellesely, Stanford, the American Museum of Natural Science, the Royal Society, Oxford University and others all offer free, university level courses teaching the fundamentals of evolutionary biology.
There are also open access journals with thousands of papers freely available.
If you're willing to pay a little, there are literally millions of journal articles available via Google Scholar.
I urge you to follow the evidence.