Creating an app as a hobby

How difficult is it to build an app or website similar to “Flush Toilet Finder & Map”? I don’t have much technical experience, but I would like to build something similar that I can use. I have built a Reddit bot back during COVID when I got bored with python but that’s about it.

Essentially, it would just be Finder on a Map but instead of Toilets, it could be parking lots or coffee stands for example. Or if It is too advanced for me to learn, how much would this typically cost to build? Thanks for the help!