Yeah no worries. Start by just getting a vanilla rom of almia (google is your friend). Once you have that, go to the github link above and click on the "Releases" section on the right. From there, just click on the most recent release (as of this post, its v2023.10.25.1), and download the program. If you have a windows computer, download the .exe folder. Then, make sure the randomizer and the rom are in the same directory. Then in a terminal (like cmd on Windows), navigate to the directory and do "./ranger_randomizer.exe <name of rom> randomized.nds". That will spit out a new, randomized rom named randomized.nds that can be played with any NDS emu.
If these steps are hard to follow lmk and we can arrange something else so that you can get a randomized rom.