With regard to insurance on e-bikes and e-scooters in the UK, you need to check your household insurance to check that you are covered for 3rd party claims and also, less importantly, theft from home or away.  Same would presumably apply in Tenerife.

Although it's not a guarantee, if they sell them in Tenerife I assume they are legal to use in Tenerife. Having said that, the current law in the UK is crazy -  you can buy one but you can't use it in public, but you can rent one from an authorised dealer and ride on the pavements and roads (excluding motorways). Anyway, I think they are definitely anti-social if used on pavements and lethal if used on roads. 

I have an electric bike in the UK which is probably a lot safer than a scooter.  It has 20" wheels, a step-through frame and can be folded up.  I think of it as the last stage before a mobility scooter!  Maybe a safer solution for you in Tenerife and definitely legal.

Another thing to consider, which you may only find after you have bought is major repairs needed.
There have been quite a few blocks affected by what is called concrete cancer. This is where the steel reinforcement is rusting in the building support or walls. When the steel rusts, it puts great pressure outwards and into the concrete it is surrounded in. Forcing the concrete to crack and break up. I know of 3 blocks where this has happened, and I am sure not an expert on the village at all. And the bills run into 1000's for the apartment owners.

According to the EU & Brexit agreement if you have lived in a EU country for 5 years you are fully entitled to all EU benefits, so I would have thought living in Holland & a EU resident you should be able to purchase a property unless Spain has any restrictions concerning Holland.

As for buying a property you would be doing the right thing renting first, try and rent near to your prefered purchase area.

Buying & selling, having purchased & sold 2 properties it is like any other country, location location will sell, but from the words of an estate agent over there many owners think their properties are worth a lot more than they are, hence many have been for sale for years, and with the pandemic & Brits now selling because of the EU restrictions the estate agents have many more properties for sale than for many years.

Other things to consider is any extra charges, if an apartment community fees in some complexes this can be very expensive, also look at any community restrictions or laws.

Hope this helps.

Well! you have been to LG, you like it enough to consider buying a retirement home. My advice, just do it, and cross any bridges later as they come about. You will not be disappointed!