Haven't read all posts, only the OP but.
"EVERY lifeform on Earth, humans, plants, bacteria, cells, ANYTHING with life originated with other life."
I agree with that. But it's not magic.
"All trees come from living seeds from other trees, etc. There is no life that comes from nothing, even simple cells."
I agree with this to. But remember that it's a proses of natural selection. In you example, trees comes from seeds because that was the reproductive method that work. Remember that almost half the plant species in the world reproduce asexually, without creating seeds. Seed-bearing plants can also reproduce asexually under certain conditions. The daughter plants resulting from asexual reproduction are genetically identical to the parent plant. In fact, they are less daughters than clones of the original. Plants can reproduce naturally without seeds by many methods, including sending out runners and developing bulbs or tubers which split off bulblets. Plants also reproduce without seed via human intervention, such as through cuttings and grafts or by a gardener physically dividing a root clump with a shovel. All these are examples of methods that work better for the plants. (Still using your plant example), There are some fishes and reptiles that can change sex.
"So God forming these things then putting his life force into it, him being the originator of life for the start of these things, is the only thing that makes sense."
This opens a very interesting proposal. You admit that life need a creator. Who/What created the creator? I know that it sound stupid, but think about it for a minute.
"If it was possible that life can just appear out of nothing, and all life on Earth just happened,"
Follow the evidence.
"why can't intelligent life do it? Instead of the billions of lifeforms on Earth that just happened to happen somehow, why can't we trace how they all originated and create any type of life we can imagine."
At this moment humans are doing research. Remember, you are talking about DNA the genome project started in 1987 (I think). A working draft of the genome was announced in 2000 and a complete one in 2003, with further, more detailed analysis still being published. We still in diapers.
"Why would it still not be happening today? Why would it have stopped? "
It still happening. Natural selection is the gradual natural process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment
"Also think about this, according to the bible, man was formed out of soil. Written long before we knew the properties of soil such as copper, iron, calcium, zinc, etc. Our bodies need all of those things to survive and function properly. What happens if you are deficient in copper, iron, etc. It certainly seems like we were formed from soil and the start of life was God's lifeforce going into us." "I can understand Agnostic thinking because of distrust from anything written, but for athiests, not believing life came from a God seems even harder to make sense of since no life on Earth originates from plain dead matter. Do you have alternative explanations?
" Yeah, Instead of asking for an answer, why don't you do some research first. Read a couple of books about each subject you just mention. Read form apologists, opposers, critics (neutral sources) and draw your own conclusions.
Take care,
Ismael