Arriving at Stansted Airport, suppose I'll take the Stansted
Express/Skytrain to Liverpool Street Station.

To go to Barking, may I be dropped along the route or I must go first
at Liverpool Str Station, then from there take the tube?

For instance, dropping at Tottenham Hale allow me to reach Barking
easily?

Or exists a better alternative?

Tnx for your feedback