Last October I spent a month studying Spanish  in Granada and I really liked it.
I have recently come into some money from an inheritance.

I have lived all my life in the UK but I hate the weather.

The idea of Brexit frightens me and I believe that the UK is heading to a bad place.
I can see the UK becoming  very unhappy and conflictive.

It has crossed my mind that now would be a good time to jump ship.
I have thought about living and retiring in cheap countries such as Ecuador or
Panama but the lack of a decent health service would be a problem if I fall ill.
Plus they are very far away from the UK where I have many friends.

If I moved to Spain and became a resident would I be able to get a Spanish passport and become Spanish
if I pay all my taxes.

The first thing I want to do is to buy a house in Granada.
Does anyone have any advice on this?
Is it best to use an estate agent?
Which estate agents are the best etc.

I am not an expert on moving to Spain.

To start off with have a look at the houses that are available on these portals. 

Real Estate Property Portals in Spain

Kyero

International property portal specialising in Spanish homes for overseas buyers.

https://www.kyero.com/

Idealista

One of Spain's largest property portals for buying, selling and renting homes.

https://www.idealista.com/

Fotocasa

Major Spanish property portal with homes for sale, rent and new developments.

https://www.fotocasa.es/

Habitaclia

Large property portal with particularly strong coverage in Catalonia and across Spain.

https://www.habitaclia.com/

Pisos.com

Spanish property portal for homes, new builds and rentals.

https://www.pisos.com/

Yaencontre

Property search portal for buying, renting and finding new developments.

https://www.yaencontre.com/

Indomio

Large property portal featuring listings from both private owners and estate agents.

https://www.indomio.es/

The sites above are established Spanish property portals.