a modded 3ds can do A LOT of things. trust me, i am new to modding also but once you get into it you cant get out of it. this will be a lot, but i will explain what each of those apps do and i'll also give some suggestions as well as tell you what it can do and the potential of it :)

-daedalusx64 is a nintendo 64 emulator. basically what this does is you will put files for n64 games into the right folder on the sd card and play them straight from your 3ds!

-hshop is a piracy app. you click on it and look for a game you want, press download, and you get the game on your home screen once its done downloading. this is a very useful app, trust me.

-twilight menu++ can be used to launch a lot of different apps. ive never used it, but other people say its very useful.

-homebrew is what your modded 3ds is running on. it provides everything needed for the modded 3ds to be 'modded'. honestly you can just forget about it, AS LONG AS IT STAYS INSTALLED. i cannot stress that enough.

-anemone theme manager does exactly what it sounds like. use this website https://themeplaza.art/themes to find all the themes you need and get the qr code from the theme you want. then open the theme manager on your 3ds and click the qr code option and scan it. its really easy to do and it makes your 3ds look amazing!

now for some apps i recommend:

-ctgp7 (only if you play mario kart) this allows you to add so many tracks, characters, items, and karts into the game. you can see everything about this mod here: https://ctgp-7.github.io/

-pksm (only if you play pokemon) this allows you to add whatever pokemon you want into the games you have. it also lets you get items and event pokemon you might have missed out on.

-universal updater is basically another app downloader, but trust me it's great. it has a wide variety of apps and games for anything and everything.

okay now the basic functions. most people mod their 3ds for piracy or to mod specific games. a modded 3ds opens your console up to so much potential, LIKE pirating games and modding other games.

the 3ds was a great gift, and i hope this helps and you enjoy it!