there is a small, easy to read sefer that many have found to have spurred them on to very deep changes is their lives.
Bilvavi Mishkan Evneh
author unknown
most seforim stores never heard of it
you can purchase it online at mysefer.com
it is for anyone at any level, as long as you truly want to serve the Ribbono Shel Olam, in the best way you can.
there is a nice translation (dont let the awful cover fool you) called “A Sanctuary in my Heart”