How to work the Spanish accent?

Do you know Spanish after 6 months of intensive courses? How to stimulate your hearing and speak with the “neutral” accent of a Madrilenian?
“The first time I was in Barcelona, ​​I didn’t understand anything they were saying.”
Spain has so many regional diversities and specificities that the language, a product of the history of Spain and Spanish culture, is not uniform throughout the territory.
In Spain, each region has its own accent (and we even find co-official dialects and languages). Of course, Spanish is the official language of the entire country and, therefore, the mother tongue in almost all the autonomous communities. However, six autonomous communities (of the 17 that make up Spain) present other languages ​​as co-official:
Catalonia: Catalan and Aranese (Occitan).
Valencian Community: Valencian.
Galicia: Galician.
Basque Country: Basque.
Balearic Islands: Catalan.
Navarra: Basque.
Although most of these co-official languages ​​are of Romanesque origin, such as Spanish, there are times when an Andalusian will have problems understanding a Catalan or a Basque.
However, when it comes to speaking Spanish, the differences are based on accent. But to speak Spanish and have good oral communication, luckily, you won’t have to learn all the accents .
The accent of a language is made up of pronunciation, stress, and intonation.
Working on the Spanish accent is, therefore, a trio that you must master.
And in this, there are no miracle remedies: you have to learn in Spain, practice with Spanish speakers and immerse yourself in their environment.

In addition to playing ELE classes, you have several complementary solutions: How to work the Spanish accent?

Watch movies and series in Spanish.
Listen to radio programs in Spanish.
Imitate the Spanish accent.
Talk to natives of Spain or other Spanish-speaking countries.
Doesn’t the immaterial cost (time) and material (budget) scare you to progress in Spanish?