Your entire reality is a reflection of you alone. There's no-one else here but you.

While there are other aspects of consciousness playing the game, you never see them as they are, you only see them as you attract them to be.

You perceive everything through your own personal filter of consciousness. Every event, every interaction, everything that happens in every moment of your life is all about you and no-one else.

So this statement of yours is fairly accurate...

is this my reality and everything and everybody in it are here to make it real FOR ME?

Here is Bashar addressing the idea:

https://www.youtube.com/watch?v=c3n5guTodPc

If you want to prove to yourself that everyone is a reflection of you, try this little exercise...

1. Pick the "nicest" person you know in your reality and, for the next 30 days, find new things about them everyday that you DON'T like. Anything that annoys or irritates you will do, no matter how insignificant.
   
   
2. Pick the "nastiest" person you know in your reality and, for the next 30 days, find new things about them everyday that you DO like. Anything that pleases you in any way will do, no matter how insignificant.
   
   
3. Watch how the "nice" person gradually transforms into someone "nasty", and the "nasty" person gradually becomes "nice" :)

In the book is never revealed exactly what to do to perform the cleaning... [snip] ... judging by the testimonials it seems there is much more that needs to/can be done. Does anybody know about that?

As for your comments about there being much more to Ho'oponopono than repeating those four statements, one might want to bear in mind that when you investigate Mr Vitale's works in detail, you might notice a pattern of there always being something more you need and, miraculously, the thing you need always just happens to have a slick online ordering page available ready for you to purchase it :)

No offence to Joe Vitale fans. He's a businessman first and foremost and he's just employing business practices that maximize profit, as any good business person would. Other related comments are at: Anyone read Dr Joe Vitale's latest book 'Instant Manifestation'?

Who are you saying "I'm sorry" and "Please forgive me" to? To God? To yourself?

It sounds a bit like begging which is a negative energy. You don't need to beg God or yourself to forgive you, begging for forgiveness is a human concept.

Someone who is Merciful does not need to be "begged" for forgiveness. They will give you.

Relax into your Heart Center, you are Safe.