There are already platforms like Gofundme, you can run your own if you have BTCPay server setup. One of the free options is for you to setup your own pages for yourself or anyone you want, where you can accept bitcoin donations direct to your own bitcoin wallet with no company in between. I setup a demo page a few months ago for one of the companies I work with in South Africa to see here: https://btcpay.bitcoinzar.co.za/apps/3HttP6btREe41CkzvGe6GDaL4Udy/crowdfund

Using BTCPay server you can basically run your own Gofundme server
If you are interested in checking out BTCPay, visit their website here: https://btcpayserver.org/