How to install Drastic without WIFI?

I’m kind of completely new to all this stuff, but I’ve downloaded MuOS and I’m loving it! Only issue is that I’d like to be able to play on the NDS, which means I have to download the core for it (drastic).

That’s fine and would probably be easy, but I can’t connect to WIFI. Thats a whole other issue I’ll have to figure out, but for now, how do I install it without wifi? I promise I’ve been trying to research but I cannot figure it out loll.

I got to the github page, but I couldn’t figure out how to download the drastic file itself lmfao… and on top of that, I have no idea how to use the Archive Manager even if I do figure out how to download it. At this point it might be easier for me to fix my RG35XX+'s inability to find network connections than to do it manually ;-;

Download Extra.-.Nintendo.DS.muxzip from the Core Repository Release Page, put the file in the ARCHIVE folder at the root of your SD card.
In muOS, go to Applications>Archive Manager , the file will be shown there, press A to install.

Thank you so much :-)!!!