My request from this forum is to give me more hints on other things I must lecture them on concerning 😟 Bitcoin and how to receive payment from customers.
This is great. I followed your previous thread. Also, coming back to ask for more hints on what to teach your employees about bitcoin proves that you are committed to making it work. This is my two cents. First, have your employees sign up on Binance or on whatever platform appeals to you. Teach them to buy and sell bitcoin. It sounds crazy but unless they get to understand the importance owning and using bitcoin for transactions from personal standpoint, it will be difficult for them to see the importance in the business.
Signing up without proper knowledge may result in losing the fund.
It should be teaching them first how Bitcoin will work and how it will store in a safe place, let them understand that storing in custodial exchange might have a chance of losing their fund. After purchasing it should be transferred into the non-custodial wallets. Transferring crypto isn't reversible, they should be careful with every transaction.
Chose a wallet that you can modify the fee which I think Electrum wallet is enough for this.