how many you received good what you have is that you register in localbitcoin and ready you can sell them in localbitcoin of your country they transfer you to your account of your normal bank and already

(1) transfer your bitcoin to a new wallet.
if you have a paper wallet, just create a new one and do the transfer.
if you have a wallet which is not deterministic and you have only 1 address, then just create 1 new address.
if your wallet is HD (have a seed) then create a new wallet.

(2) find a wallet for these new coins
you can claim most of them using coinomi wallet[1] it supports most of them.[2]

if it doesn't have a coin, then your only option is to download the official wallet of that coin. always find their GitHub repository and download it from the source.
also make sure to install them in a sandbox (a virtual machine) since they are not exactly trusted.

(3) find an exchange to sell these coins.
usually Yobit supports anything that moves. but it is not such a good exchange and your deposit/withdrawals may get stuck. use it as your last option.

[1] https://coinomi.com/ double check the link to see if it is correct
[2] https://medium.com/@coinomi

ps. it is very hard to say how many because it is hard to keep track of all these forks! there may be at least 50 forks planned, 30 happened and at least 5 turned into scams and died the first day.

I was also collecting many shitcoins through airdrops before until the time I got so tired in wasting my time and effort as many or most of them will never see the light of the day...they will just a natural death and be gone for good though they will remained in our wallet forever. Well, we could not stop anybody from introducing his own shitcoin as we are in a free world so it is all up to us whether to participate or not.

bounty is much better than hard fork and airdrops it better to work in bounty rather than collecting shit coins