How difficult is it to learn OAF?

Guys
I have 10 yrs exp of apps development, but only of the 'traditional' d2k toolset + pl/sql, workflow etc. I now realise that i really need to know oaf , but looking at the manual it seems daunting to learn, especially when you don't have java/web development experience.
Does anyone have any advise on the best way to get to grips with oaf, start with java maybe, or go on a course?
I know the d2k toolset is basically dead, oaf (and then adf it appears) will be the predominant technology in future. looking at release 12 vision , it was noticeable how much of the new functionality was only available as oaf.

From my experience I feel BPEL has much more capability than BPM/BPMN. From learning point of view it is easier than BPEL as it has got fewer components compared to BPEL. Oracle Handbook cover basic topics like Hello World programs. Advance topics are hard to find on the web for BPM.

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    hsawwan wrote:
    1) Where can I download Jdeveloper 10g with OA externsions? It seems Jdeveloper can be downloaded from Metalink, but I don't know how to sign up for it. Can I download Jdeveloper 10g with OA externsions without having Metalink access?Please see these docs (you need to have a valid username/password and CSI number to download the patch).
    How to find the correct version of JDeveloper to use with eBusiness Suite 11i or Release 12 [ID 787209.1]
    How to find the correct version of JDeveloper to use with eBusiness Suite 11i or Release 12.x [ID 416708.1
    Configuring JDeveloper For Use With Oracle Applications 11i and R12 [ID 330236.1]
    Troubleshooting JDeveloper setup for Oracle Applications [ID 357218.1]
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    Re: How to start learning OA Framework?
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