Finally bought Elden Ring after years of neglecting it. [Pc]

I've played sekiro, ds1 and ds3, people have mixed opinions on which is harder. I'm the kind of guy who thinks hard does not mean better, so the game (elden ring) being easier is much preferable for me.

So questions:

1) what is the best and the easiest build for a beginner like me?

2) in levelling up, should I level up enough or over levelled before I fight the boss? (What is The best way to not ruin a virgin's experience)

3) exploration, should I skip the mini bosses/ bosses to explore first or beat the bosses first and then explore? Also, can I just explore for the things that are relevant for my build only?

Spoiler free please.

Hope you guys can offer some tips, what to do first and what not to do. Thank you in advance.