I'm not aware of any free solutions for CDC, as this type of thing can be very complex, and is generally considered an enterprise level requirement. Any company developing a solution will naturally expect to get paid for their work.
If it's something you need to do in the free version of Talend, then there are approaches which may well work, but you'll need to engage with a paid consultant to discuss your requirements and develop a solution which works for you. This is unlikely to be something that can be done quickly.
In the long run, you'll probably be better off looking at commercial options like the Talend subscriptions, and if it's something you need to do urgently, then you're definitely going to have to pay for it.
Questions on Math exam:
- how to prepare tea?
Answer - take a kettle, fill up with water, boil, put tea bag inside
Next question - How to prepare tea if Kettle already with water?
Answer - empty kettle ... return to previous condition!
Same with Talend
Q; How to realize CDC with Talend?
A: Look - what Talend can do well? Look around - who can do other part of Job? And how we can connect them properly
