I conclude one definite solution to all. I should master XHTML and JavaScript along with some transparency and suggest to all of the charity to provide a donation address which can accept a cryptocurrency, also I could implement one if they don't have an idea or knowledge of cryptocurrency.
I know several charities which are close to me that aren't considered big ones and some which deal with medical conditions unheard of by the majority. I contacted one of them about accepting Bitcoin and they replied stating they do not accept Bitcoin, although they are open to possibly accepting it in the future funding to get someone who is knowledgeable in Bitcoin and setting it up would cost too much money for very little return based on the amount of inquires they have.
It would be awesome if you/someone could approach these types of charities in getting something like this sorted out for them free of charge.
I really do wish more charities will step up, but if I may be honest, I feel that if charities are savvy enough to accept crypto donations, then they are probably inclined to pay for the web developers services for including crypto donation options as a method of receiving funds. Just another unnecessary expense, in my opinion, that detracts from using funds for their intended purpose of the charitys mission.
Like I mentioned above they probably don't have enough people showing interest in donating in Bitcoin to actually pay for a coder to get this up and running.