Mount it on a standard aerial pole attached to a fence post (use a compass to find N to align the station). Hit reset on the unit after putting batteries in and it immediately 'talks' to the base station. Follow the instruction manual and it's very straightforward to calibrate and get data on to your chosen sites
Watson 8686 £170 from Nevada Radio is an Ecowitt clone, mine replaced a Yoshiko and has been faultless for the past 2 years and streams via a base station to the MetOffice, WU, Ecowitt and WeatherCloud
Comes with a mains powered console which 'connects' to your wifi. Without looking at the details I think that mine is uploading to Met Office, Weather Underground, Weathercloud & Ecowitt