So the main thing I'm picking up is that I need to move my BTC to a BCC supporting wallet, is that the important first step?  I'm on Multibit Classic (i believe its known as, to me its 0.4    ), so gather moving is a good idea anyway.  Then if necessary trade BCC through a BCC supporting exchange.

Some advise seen is to transfer BTC to new addresses, then filter the coins, bit concerned about bleeding transaction costs there, or is this insignificant?

I've been out of the loop for some years, came back to Crypto in the summer and the Bitcoin cash split.  Searching internet I dont see a lot of help and mostly from July/August.

What happened?  Are wallets supporting it?  Anyone give a run down, and views on whether to cash out or stick with it?

Same issue, I've just recreated, there must have been a purge?