I'd most strongly recommend that you use a very powerful tool when you get to thinking about cleaning this painting , amandal .
That tool is common sense .
Leave the cleaning of your fragile painting to someone with specific experience in cleaning oil paintings !!!
I'm certain that this one would make a very bad 'beginners' project , esp. in it's current condition .
The painting really belongs in/on a stretcher frame .
Nothing wrong with learning about how-to , but causing more damage might make you cuss .