Cleaning Validation Noob

Ok, I’m brand new to the whole cleaning validation thing. I have no idea where to begin. Every time I start to read or research about cleaning validations, it seems like too much info to process. Does anyone have any recommendations about well written, easy to understand descriptions of the cleaning validation process? Also, has anyone attended any of the many training courses that they would recommend? Any suggestions from those of you who have been in the validation industry for years would be much appreciated. Thanks in advance!!