[Rusty]

De nada.

There are several sites that teach Spanish. There are many tutorial videos.
Resources are many and quite varied.

I don't have any particular recommendation, except that you should find ways to learn the language that click with you. Total immersion is the best way to learn a language, but isn't always feasible.
Since you live in the UK, I would recommend learning the Spanish spoken in Spain, unless you're planning to relocate. The Spanish spoken in Spain and that spoken in Mexico differ just as much as British English and American English do.