Mid 2007 iMac El Capitan 10.11.6 upgrade to Sierra?

Hi forum members,

I currently own a mid 2007 iMac running El Capitan 10.11.6 2.4 GHz with 6GB RAM.

My rig was running happily a few weeks ago until my Dashlane app was acting up. Well, it turns after contacting Dashlane the desktop app no longer supports El Capitan and I must upgrade to Sierra.

App store no longer carries Sierra but an Apple hyperlink show it here:

https://support.apple.com/en-us/HT208202

But lo and behold, it only applies to Apple iMacs 2009 or newer.

So now I am stuck. I am wondering if a recent post in this forum re: diskMaker X will be the solution to my MacOS upgrade path?

Lastly, if I were to successfully upgrade to Sierra, is the upgrade path to Mojave good as long as the RAM and CPU is able to support it?

Thanks!

AF1