Hello everyone,
I have done some small maps in the past, but only for RPG games, using GIMP and some Inkscape.
Now, I am a hobbyist gardener and I would like to map the ideas I have of what to do with a land or previous works, like what trees go where, where is a pond, this kind of stuff. Unlike in RPG maps, here I need to be precise with distances and sizes.

Quite a few people have recommended me QGIS over GIMP for it's more a standard in spatial measurement. It looks nice but before diving in the study I wanted an opinion of yours: is it worth to learn a new tool? What are the main advantages of QGIS over GIMP? I will gladly invest some learning hours if then I can have an easier life and more accurate maps, but it's really this the case?

Any other in put like plugins is also appreciated

Thanks for your help!