3delamadrugada on "same domain opening two different blogs, can I do it?"

hello,

I have one blog, and I want my domain www.davidfernandez.org to open it,

then I have another blog and I would like to open as if it were a page of the first blog, so open it with something like:

www.davidfernandez.org/secondblog

can I do that somehow?

thank you a lot!