Not at all, the heat pump needs a solid concrete base or can be laid on paving slabs. The unit then needs an electrical supply and it is best to get a qualified electrician to install this.
The plumbing is straightforward and the pipes are glued together. The heat pump only needs a flow and a return pipe.
You should install 3-valves to create a “bypass”.
The heat pump should be installed after the filter and as the last item before the water returns to the pool.
If you want to install the heat pump alongside your existing heater, then the water should flow through the heat pump and then through the existing heater before returning to the pool
See our Installation section for lots more tips on installing your heat pump