ya it will effect to your 2nd blog.
All these things depends upon the back link. create a back link with off page activity, for your portal site. and advertise it with classified...
both are good , no-follow giving direct traffic, but do-follow gives from search engine.
keyword planner is the best tool while you are researching the keyword for your website.
No , Google cannot penalize your Songs lyrics website. if your content is in your way.
you have to do both , But start with on page optimization,and optimize the things like image , video, keyword,description,title and many more.
At first you have to understand , Google gives the result on content basis, but yahoo giving result on traffic basis.
SERP depends upon website update with quality back link.
As for my experience forum is best for back-link.
You can use the keyword according to image, So no problem to use the keyword in alt attribute .
go to your blog under the head section insert the meta tag then update.
Separate names with a comma.
