--I believe Chuck, who posts here regularly, has a fairly lengthy low level background, as well.
Yes, I did a fair amount of it during my career, seven years crop dusting both fixed and rotary wing , fifteen years captain on heavy water bombers and one season low level survey flying an Anson mk.5...that otta date me.
SNS3Guppy has pretty well laid out what it involves.
So my only advice is " DON'T " attempt low level flying without two things.
(1) Proper training.
(2) A reason to do so and thrills are not a good reason.