oh my god I wouldn't know where to start...
1) download the latest BTS 0.9.1 version found here https://bitsharestalk.org/index.php/topic,7067.0.html
. This will take c4 hours to download the blockchain
2) Create an account and ask from someone to send you some BTS to register it.I think there is a faucet for that.
3) Once your account is register, go to that account and import your wallet.dat file from PTS and BTC that you gave donations or have your PTS etc..
You should receive your BTS and NOTES. PLAY shares will be claimed later this year I think, unless you have donated to their crowdfundrasing..
Also on the BTS wallet you will see a section advanced when you can write some commands. Go there and write "collect_vested balances_"your account name". Some additional BTS will appear that you can claim on a daily basis. These relate to the merger of DNS and VOTE to BTS.
Finally, sell all your PTS in an exchange and buy more BTS. PTS are worthless imho. Hold all your BTS in your wallet, don't sell at these prices, if you can buy more NOW, forget about it for another year, come back next year and you will most probably be rich