iPad, iPhone, and laptop all have a built-in versatile resource called Shortcuts that may be an easier option for you. I will highlight some of the useful quick-wins of this app, beginning with Creating a QR Code.
Using Shortcuts to Make a QR Code:
Steps:
1. Open the Shortcuts application.
2. Tap on All Shortcuts
Even if you have never opened the app, there are some 'starter' shortcuts, including Make QR Code
3. Tap on Make QR Code
4. Select which task you would like to accomplish. Most of the time I use 'Open Website'.
4. Paste in the web address.
5. Now Save/Send your new qr code to wherever works for your application.
I most often send mine to Photos, where it is saved as an image.
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You can select from a Gallery of other shortcuts in the upper left corner.
Tap the "+" icon to add to your list.