This is not an easy question to answer if the one asking it won't believe in God or disavows God. They claim to want evidence for a God in order to believe, but I do not they really want evidence for God. There will be no evidence they will accept. Thus, they will not accept Jesus Christ as our Savior and the afterlife. If you haven't figured out why you need a Savior by now, then no one will be able to help you.
In my case, when I was in my late teens and early 20s I wasn't satisfied with my life. Something was missing in the sense that I knew what I was against, but what was I for? Next, due to discontent and problems in my life, I ended up doing drugs. It was a fun time, but not a productive time. The higher the highs, the lower the lows. After having faith and believing in God, I was able to overcome my spurious life style. I was able to find the answers to questions I was seeking. Then in 2012, I became a born-again Christian and was baptized. Through my faith in Jesus, I was able to find satisfactory answers to creation vs evolution and the afterlife.
For some, the period of life after death will be darkness. It will be a disorienting time. The ones who will counsel and console you will be the ones you listened to in life. In this disorienting period, you will be brought forth for judgment be assigned to your final resting place. For others, it will be a journey where one travels to a destination. It could be by train, plane or some other supernatural method. You will be judged favorably and find your name in the Book of Life. Everyone will want to get into heaven, but not all will be able to. If I die tomorrow, then I will be ready and happy. There are still things I want to do and accomplish, but it's to serve Jesus in the best way I can.