Charity Plans

adobe has non-profit plan pricing. start here - https://helpx.adobe.com/enterprise/using/non-profit.html

I don't know if Adobe have a discount structure for charities. In the US there is an organisation "tech soup" which manage this. In terms of license, you need a license per person. The choice is between 

* individual license - belongs absolutely to the individual. If they leave, it is a gift to them. The organisation which pays has NO right to cancel or transfer, and the individual, while they can cancel subject to a possible penalty cannot transfer it. 

If you were dealing with tech soup (but you won't be because you aren't in the US) they offer individual licenses, via an access fee, at discounted rates of approx 60% discount in the first year and approx 40% after that  - the same as a student license. 

* team/enterprise license - managed by the organisation. Organisation can assign and revoke licenses.