Posted: Tue Jun 28, 2022 2:31pm
If, first of all, you are ok with the conditions for the NLV, I would recommend a <90 day visit to your chosen location. Look at a longer-term rental from September (better rates) and see how you like it.
How well you settle in depends on what you like to do with your time in the UK, and/or how adaptable to change you are. Learning some basic Spanish would be a good start; and make sure your EHIC/GHIC, or travel insurance, is valid for the duration of your stay.
In my experience, people are friendly here and your age is not a handicap. Best wishes with your plans.