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What do I need to get started

Looking at installing smart heating system and I’m leaning towards Tado, but I’m not sure what I actually need. In a new build house with two heating zones (upstairs and downstairs) and a system cylinder for hot water.
Is it two starter kits (one for each zone) and an extension kit (for hot water) then I’d look to add TRVs later.
Currently there’s a thermostat in downstairs hall and one in master bedroom (which also has a TRV on rad which is strange) think they’re both wired but won’t know til I open them up. And a program/timer panel next to the boiler in the downstairs utility room. Then the hot water cylinder with the 3 zone valves is in airing cupboard upstairs.
Is it fairly easy to set up?