I have a POS (Point of Sale) system that we spent thousands on the licensing for years ago and paid a monthly subscription fee of $149 a month for. The POS system has a few issues as do most I suspect but is mainly reliable. However I've become annoyed with the company recently. A basic report broke over a year ago showing incorrect totals for my sales figures. Now I checked my credit card yesterday and saw a transaction for $396 for a month instead. Apparently they'd changed their licensing model and sent an email in April but sent it to a dead email address from before I took over the company despite it being my card, registered to my account, registered to my email address. They've offered to change the contract to $276 per month but that is still a big increase and I'm annoyed with them now.
So I've started looking around and found an Open Source system: https://sourceforge.net/projects/unicentaopos/
That system is free of charge to use since its open source, or an optional £60 per annum to get access to technical support from them. A bargain it seems crazy not to go for that. One issue though is my current POS is all on Apple iPads and iPods while this system only works on Windows 10 or Linux. So I've bought a cheap refurbished Win 10 tablet from eBay and want to download the thing and play around with it.
One thing I've been advised is that we would need to set up our own database using mySQL and they recommend a database admin does that. Obviously that was part of the licensing fee we were paying the other company for and hiring a consultant to run a database for us would probably eat into the savings I'd need to pay for replacing all our POS tablets etc. OTOH this is business-critical so it might be a madness not to get an IT expert to set it up for us. The system uses mySQL.
I have no experience with mySQL. Is it reasonably simple to pick it up for a well-meaning amateur with access to Google?