https://forkdrop.io/ is what you're looking for. It has detailed information from specification, links to project/social media and even exchange which don't need KYC
Is there risk claiming forks?
Yes, there are few risks such as :
1. Private key/seed stolen to claim your Bitcoin and other forked coins. But this can be solved by send your Bitcoin to another address/wallet before claim forked coins.
2. Risking your privacy since malicious wallet/services might know your address. Additionally, you can compromise your privacy by using all address/input on a transaction when sent forked coin to exchange/another wallet.
Is there a charge for claiming forks?
No, unless you use 3rd party services
Are there forks that are worthless?
Most of them are worthless and usually it's price declined over time