I'm not sure the question is needing to convince someone to delegate to you, it's more about how can I get enough Hive power to continue working on Hive when you have low resource credits. I think the best solution currently available for this is to use gift giver.
Gift Giver offers delegation for those with low HP to be able to transact on the blockchain, you can find them here:
https://giftgiver.site/#delegations
They have a frequently asked questions section which should clear up any questions surrounding the service they run, and yes, it's free if you don't have enough Hive Power.