It okay to make a list. You don’t have to go into great detail. I was 56 when I had my first confession! I used the 10 Commandments to organize and summarize them. You probably aren’t going to be confessing anything the priest hasn’t heard before. Plus the priest goes to confession too. I read up on the order before I went and took a prayer of contrition with me to read. I prayed to God before I went and asked Him to help me make a good confession as well as the Saints.
Then the priest absolved me of all my sins since my baptism as an infant. Wow!