It is true that in chemistry, a lower potential energy state is favoured. However, most of the lowest energy states for a molecules are quite boring, e.g. water, which is incredibly stable, CO2, CH4, CO, etc. So technically speaking, the "natural selection" of small molecules would lead to only basic substances.

The issue here is that the level of molecular complexity required to do anything useful with one of the these molecules is much too high to have formed spontaneously. For example, the protein that can break down alcohol (alcohol dehydrogenase) is significantly more complex than the alcohol molecule it breaks down. The same can be said for proteins that form bonds in other chemicals.

Could functional proteins form randomly? How many different proteins are expressed in humans/plants/.../etc.? Roughly 30,000 in humans excluding splicing. They are each, again roughly, 100 amino acids in length. Let's be really generous and say there are 1,000,000 functionally different alternative designs to each protein that perform the same function (generally across species a given protein looks similar). There are 20 different kinds of amino acids in human proteins. People often do experiments by changing one of the amino acid residues in a protein to see if the protein becomes non-functional - let's say about half may be swapped. So how many functional human proteins could there ever be? 30,000 * 1,000,000 * 20^50. If we randomly try to reproduce a human protein there are a total of 20^100 combinations. So of our pool of random proteins, (30,000 * 1,000,000 * 20^50)/(20^100)=1/(10^55) of them are actually functional.

From here we can work in either time or space. Most proteins fold in milliseconds to seconds and nearly all proteins require a decent amount of water to work. The hardest part is that proteins don't know if they are functional or not, they just randomly wobble through jelly (water at the nanoscale) so any activity would require all the functional proteins to be in the same physical location.

Unfortunately, the chemical world, particular biochemistry, is really complex, even though we have managed to produce simple models that generally work well. Don't get me wrong - I certainly enjoy science and I think it is an amazing way to appreciate God's creation.

Now on the subject of Christianity, you wanted me to explain what it is. A Christian is someone who recognises that God is real, has the character of perfect love, wants to save and desires to walk with us. Jesus (meaning "God saves") was a gift to humans to supernaturally provide eternal access to a perfect God from a fallen nature. Good works are a form of godliness but are not powerful enough to bridge the gap.

I hope that answers your questions.

Blessings, Matt