Pronunciation problems

[Ean]

Hola, I am a beginner and before I dive into learning I would like a few things clarified to me about pronunciation of some consonants and the rules that surround them. My confusion comes from the fact that looking online at various sites about pronunciation, I ended up hearing the same words pronounced differently. I understand that since Spanish spoken people are spread wide all over SA and Europe, the accent varies. Some sites provide two or even three different accents depending on the area they are being spoken. Some other sites prepare you to learn the European Spanish pronunciation. Some others do not provide such a clarification nor a distinction between these.

So I ended up listening for example the word like cereza as se-re-sa in a site which was teaching European Spanish language.
I am unable to determine which site to trust and if what I am learning is actually correct.

Any recommendations would be appreciated. Thanks in advance