你好 ;)
1). "听起来好" is not wrong in fact.But it sounds a little strange ;)If you want to say "It sounds great",it should be "听起来不错"“听起来很好” and so on .
2)."听起来" means "sound(s)" in English.For example: This idea sounds great=这个主意听起来不错
I hope it helps ;) And if you have any trouble learning Chinese,feel free to ask me ;) And i will try my best ;D