Make me a BEP20 token that adds a 2% transaction fee on all buys and sells that converts to BNB and sends to transaction wallet

Hey, I can write and deploy bep20 smart contracts but I'm struggling to make a function where on every transaction there is a fee that automatically goes to the charity wallet as BNB rather than the token itself. I have seen there are many projects that have similar functions such as HODL or GLITCHY that have a similar function and these tokens then add these to a pool on their dapp which users of the token can claim a part of each day. I want to use this idea to automatically add the BNB to a charity wallet so basically the contract can continually generate revenue for some amazing charitable organisations, it's all for a good cause and I'd love some help to make it happen.