I have a Fantasy RPG SFX software as well as some bought general packs so I could definitely help you out with some monthly SFX to get you started. I also have a shiton of fantasy / dark fantasy music as well. I offer all of that through a Patreon system, so it's all very affortable and you get a little bit of assets per month, so it's not overwhelming to you.
Here's the link in case you're interested:
https://www.patreon.com/FictiumSoundDesign
The problem with the SFX is that sometimes the sample itself is of a bad quality and no amount of editing will fix it, for instance, I don't really like the fire spell SFX that this software that I have generates so that's something I have to create it manually layer after layer.
Also, here's my youtube handle @fictiumsosunddesign, in case you want to check out all the content I created so far of video game music.