I will make an attempt to give a possible answer to your second question on the problem of evil. You are right that it is a logical impossibility for God to create Himself. God who has existed eternally cannot create another being who has existed eternally. However, I think it is possible for God to create a being with some of His attributes. God is good, and so God could create a being with all of His goodness. God is immutable, and so God could create a being who is unchanging. However, if God created a being who is fully good and unchanging, all God has done is replicate His character in a created being. In essence, God has made a robot that can only be and do what it is made to do. It will be a being that expresses love, but not by choice.
The reason God is immutable, unchanging, is that change is due to a deficiency in character. If God is the Greatest Conceivable Being, it is illogical for Him to change, because by definition He can’t be deficient. As humans, we can either do things to improve ourselves, or things to make ourselves worse. This is because we lack the nature of immutability.
So to your question, God could have made humans who were less likely to choose to sin. In the garden of Eden, God could have been present in person with Adam and Eve at every moment of every day. Imagine a child wanting to eat a cookie from the cookie jar against his mothers instructions. If the mother was sitting by the cookie jar all day, guarding it, it hasn’t stopped the child’s free choice to go and steal a cookie, but has greatly impacted the freedom the child ‘feels’ it has to do so. Likewise, Adam and Eve probably wouldn’t have sinned if God was standing right next to them by the tree of knowledge and giving them a glaring look.
So why did God give Adam and Eve so much freedom from perceived pressure to act a certain way? I believe it is because God wanted them to choose to love Him freely. God wanted them to choose to live in His grace through faith, to allow them to grow in holiness and grow in love. God didn’t want to just replicate His nature, He wanted people to choose to become like Him. God could have made a free-will being, who under the right amount of pressure would always choose the right option- but that is not what God wanted.
Therefore, God knew in His foreknowledge that man was going to sin, and He knew that Christ would have to suffer and die. 2 Timothy 1:9: “who saved us and called us to a holy calling, not because of our works but because of his own purpose and grace, which he gave us in Christ Jesus before the ages began”. I believe God created us in such a way that we have the greatest capacity to grow in love, but this gives the downside that we also have a great capacity for disobeying Him and for doing incredible evil.
I hope that is some form of an answer to part of your question .