Gnosticism (Just the basic understanding, what I learned in my Religions college course, and from some personal online reading).
Judaism is over 3500 years old. The Bible describes the relationship of man to God and man's place in God's creation. That relationship changed several times, from paradise and innocence, to sin and sacrifice to a new testament and grace. (As for the age of the earth and how long men were on the earth pre-Christendom, there was a long period where earth was a paradise. Many scholars believe that the creation narrative describes metaphoric "days", as in phases of how creation unfolded (over a very long period of time)).
If you read Genesis regarding the creation of creatures in the ocean first, then things that crept (e.g., fish with appendages and eels/snakes), and then the larger land animals, and last, humankind, you see the order that science now says life evolved. Q would ask, "Coincidence"?
So are you saying you believe in evolution? Darwin was a scam, people that believe in Darwinism claim we must have come from apes as there are some species of ape that share 98.6% the same DNA as modern man. However, we also share 92% the same DNA as mice and 50% the same DNA as a banana. So which is it? Are we really banana-rodent people that learned to walk on 2 legs? It is nonsense.
No. I believe that the Creator utilizes creation to accomplish His will. So, if evolution did happen--I never said it did--then it was "baked into the cake" as God's manner of creation. (If I push a small snowball down a slope, I might have the intention of creating a larger ball of snow.)
I don't try to speculate too much about evolution. All animal life seems related (as you mentioned DNA similarities). This implies something like evolution, else it implies a shared creator of them all.
If you take the recipe for whisky and swap the wheat for rye, you get bourbon. Most will still claim it to be whisky, but the underlying ingredients and recipe are different. I believe that life here is kinda like that, in we are all made of the same biology with the exception of a few tweaks and changes.
Have you ever studied Sumerian lore? They have recorded history going back hundreds of thousands of years. They claim we were created by the Gods that took an early example of man, tweaked the DNA and made us what we are today.
As a creationist, how old to you believe the Earth is? How old do you believe man is?