( Plumbing) What is the proper way to snake outside drain?

( Plumbing) What is the proper way to snake outside drain, from house to street I believe it is clogged from tree roots. A tree is growing in direct line of pipe to street, Roto Rooter wanted 400.00 to snake it, I was going to rent an electric snake and attempt to do myself Ivedone a lot of my own repairs I just never used an electric snake before. Help