audio amplifier circuit design
Since you say you need help designing the board, I assume you already have the circuit designed. You need to do the schematic with parts values calculations before you think about the board layout.
If you have specific questions about parts of your circuit for which you haven't been able to find answers, you can post them, and you'll get help.
When your schematic is done, and you're trying to lay out your circuit board, you can post specific questions, and you're likely to get help on that as well.
I can't speak for others on the forum, but I'm not willing to do your homework for you. I already did this kind of project by myself when I was learning. Ask specific questions, and I'll be glad to help where I can.