Newbie problems!

[Powerfromthegods]

Hello to everyone, I'm Alex and I write from Italy.
I'm trying to install Runeaudio 0.4 beta from 29-02-17, but I have alot of problems.
I put the image on the Sd card, and after i start my Raspberry Pi3, it is connected via hdmi cable to my Tv.
First problem is not possible to use mouse, I now is necessary to change something in the configuration, but how i can do?
I can't connect Putty via wifi to my Raspberry, i have a network error: connection timed out.
And i can't put the wi-fi psw because I can't see the mouse pointer.
there is a step by step guide?
Thanks

[Discovery]

Have you tried connecting to the Pi using PuTTY over wifi or ethernet? You just need to find the ethernet address of the Pi.

Also, are you trying to control RuneAudio using the Android app (phone or tablet) or a PC? It's designed to be a headless app, i.e. no mouse or keyboard.