Anyway that's good you have the will to do it by yourself , I know it feels good when you can say " Yeah I did it ^^" Beside it's also a good way to progress.
For a logo design ?
It depends (on what the client requires) but to give you an idea I usually ask 1 btc for
- 3 different concept (logo)
- Then you pick up the idea you like the most and I can do some modification if required (you can also keep use the 2 other concept)
- You get the file in PSD (Jpg - PNG (trapsarent bg))
And I need about 3 - 4 days (max)