Since i am in an similar situation ( i got no child so far), but i know how hard it is after 9-10 hours of working to kick myself to do some perl learning (not mentioning the problem its harder to concentrate after a long day then when you are fresh in the morning).

Time "Problem": For myself this is working. I spent most time when my girlfriend is either "sleeping" (late at night) or when she is watching some "woman soap" on TV. But i find it better if i am completely uninterrupted (late at night mostly :-(). (Luckily she supports me and does more housework when i am learning which is very kind ...)

Job perspectives: Lately i am watching for job ads and yes there is often "web programming" or explicitily coding skills in Perl are demanded, even for system administration ...

The approach: Personally I try to do small portions every day, but its sometimes better if you can stay for a few hours on a project and dont have to relearn, finding where you stopped last, this costs me much time, but that may differ for you.

I think you already got some book good book like Learning Perl? Or watched the videos?

btw: I used code tags for formatting i found no other way ... If this is wrong, and you have a better solution Time to dig deeper into perl and let those nasty "br" tags be implemented automatically for my posts after X characters ;-) ...