Try this site: it has good links to a number of language courses online

Concentrate on ONE language at a time! Sign up for a class, watch subtitled films or television in your chosen language, make friends with native speakers, visit a country where it is spoken. There are free online courses available as a backup, but you really need live interaction to get any traction.

Google “free online Spanish lessons” (or substitute the name of any other language you decide on, but I recommend you start with Spanish because it is the easiest). Here is the first site that came up:

I have used the Pimsleur Method for Russian, Chinese, Spanish, Czech and Romanian. Of all this languages, the hard one for me to assimilate is Chinese, only for the sounds are unfamiliar to me, but the program is the same, and easy to use. But the others work perfect.

Try befriending people who speak any of the languages on your list. Also, spending time in those countries. I feel like full on immersion is the best way to learn any language.