Just go to the library. They have lots of basic books to learn about the internal combustion engine. Learn the basics first then branch out from there.
I did not lose my Dad until I was quite old . He was a chef and knew very little about cars. Therefor I did not learn from. I was always interested in mechanical things from the time I was young. .Took things apart that were not broken. Took power mechanics in High School. They teach the basics.
If you have an interest then will come naturally.
Over time you will learn all the lingo.
Don't be afraid to come here and ask questions. Lotsa old geezers like me to answer.