@toolate Some good ideas in there, but a few problems as well.

Firstly, normal myconids aren't blind, so it would be a bit weird to make the player version break that trend.
Secondly, the complete inability to speak verbally is very harmful to non-spellcasting characters since they would be unable to access the telepathy that would be needed to communicate.
Finally, although fey ancestry makes sense in some campaign settings, the Myconid people are usually portrayed (as far as I am aware) as being from the Underdark, not the Feywild

All that being said, most of this criticism really only applies to officially published materials, meaning that everything I just said goes out the window if you plan on using this in a custom or modified campaign setting.