I agree with the previous comment, it’s amazing how your brain adjusts to driving on the right as long as you’re in a Spanish car! – driving a UK car there is more difficult.
I lived on the Costa del sol for 15 years and found it really hard to practice the language despite trying private lessons, courses run by the Ayuntamiento (council) and chatting to the locals! Go inland, you’ll be speaking Spanish within a few months, you’ll have to! Also renting will be much cheaper inland, the costas can be very expensive, good luck! It’ll be a great adventure!!