Can someone recomend me a resource on Stoic philosophy? Preferable user friendly. Thank you.

I would recommend something, but it really wouldn't matter, would it?

Sometimes we just have to deal with disappointment.

For general information:
The Encyclopedia of Philosophy, ed. Paul Edwards
The Routledge Encyclopedia of Philosophy

For super-brief info:
The Cambridge Dictionary of Philosophy
The Oxford Dictionary of Philosophy

For good books about Stoicism, you can try:
Stoic Philosophy by J. M. Rist (Cambridge, 1969)
The Stoics 2nd ed. by F. H. Sandbach (Hackett Pub., 1989)

For primary texts:
Hellenistic Philosophy: Introductory Readings, 2nd ed., trans. Brad Inwood and L. P. Gerson (Hackett Pub., 1998)
The Hellenistic Philosophers, 2 vols., trans. A. A. Long and D. N. Sedley (Cambridge, 1987)

Just what I have on my shelf.

David

If you want a quick treatment, then you could read the first volume of Copleston's history of phil.

As for larger works, The Cambridge Companion to the Stoics is about all I can think of.