Archive.org, funkwhale, with only mp3 or ogg there is also dogmazic.net

If you want to start simple, just use LMMS to make electro-drum’n bass music by messing around. When you understand most of it, move to a proper DAW (Ardour and such) and try doing the same thing with it. Start with a few plugins (the preinstalled ones) and add new ones when you feel limitated.

Feel free to ask me questions.

Congrats, you could try making a LV2 version so it could run under GNU/Linux systems.