I reject the idea that complex organs and systems evolved from simpler organs as a result of random variation and natural selection, because there seem to be insuperable obstacles, some of these obstacles are.
1 discordances in the tree of life
2 genetic entropy (random mutations on average deteriorate the genome)
3 ireducuble complexity (many things have to evolve at the same time in order to get a benefit)
4 Haldane's dilemma (there is not enough time to account for the differences between say humans and chimps)
That's an incredulity fallacy - something is untrue to you because you can't understand how it could be true. Almost all experts in the field disagree with you. They CAN see how the theory is correct. It's not debated any more.
As a theist (Christian) I see no important implications, whether if evolution is true or not, doesn’t refute nor supports the claim that Jesus resurrected ………….. so any theological implication would be secondary in my opinion
Many of your fellow Christians reject the theory because it contradicts scripture. I'm unaware of any non-Abrahamic theist that has a problem with the theory.
The connection to Jesus is that he was allegedly sent by a deity that is said to have created the kinds from nothing and is later said to have resurrected Jesus from the dead. We know that the genesis creation story is false, so we are justified in rejecting the entire book as a source of history, fact, knowledge, moral instruction, and life advice.
How could it be that dolphins and bats have the same variations in the same genes ?
How about getting yourself a university education in evolution? That's the proper way to tackle a comprehensive topic. You need to learn the basics and build from there.
Barring that, get a textbook on evolution:
Then there are the books written for the interested lay public:
And if you don't want to invest that much time, there are self-teaching sites on the Internet. Here's an 18 hour course of instruction:
Evolution Today
Of course, the less effort you put into this, the less you'll learn. The way you're going about it won't yield much knowledge.
My medical education was systematic. The first year was called normal man, which described the anatomy, physiology, and biochemistry of a healthy person - how the kidneys filter the blood, histology (such as normal liver architecture), what the Krebs cycle is, etc.
Second year was abnormal man - disease states, medical microbiology, pathology, pharmacology, etc. This built on the understanding of normal man.
Third year was the clinics, where we did rotations in pediatrics, surgery, internal medicine, psychiatry and family practice. Here, we saw patients for the first time as well as more experienced doctors treating them.
Fourth year were electives, which for me included the subspecialties in internal medicine, the specialty I decided was my future: gastroenterology, cardiology, pulmonology, endocrinology, nephrology, infectious diseases, and hematology.
Then I graduated and went on to an internship followed by two years of residency in internal medicine, where we began writing orders on medical charts that had to be signed off on by more senior physicians until we were independent and able to do the same for younger docs.
Imagine if I had tried to learn that here on RF asking physicians assorted unrelated questions. It's not the way to learn any detailed topic comprehensively.