my suggestion is go for it. now days you dont need a bunch of stuff in your off computer world to learn a new language.

example english is not my native language. I am in a few english as a second language online groups for native americans. we share our language problems, translators, homework that we are working on and even tutor each other, one of my favorite parts of online groups is that we skype each other so that not only do we get experience time with writing the english language we are also having vocal conversations with each other.

so my suggestion is if you want to learn the celtic language go for it, there are probably many online groups you can join where you may meet many people who already speak celtic but are learning your language and people learning celtic just like you.