The problem is that there are literally dozens of differing theories concerning language acquisition and it is very difficult to wade through the research.
If not now, when?
There are a myriad of excuses to be coined for putting off seriously getting down to language learning.
What’s probably one of the main results you are expecting from all your hard effort put into learn a second language? You are probably hoping
Never too young!
One of my previous posts was entitled “Never too old!” where I discussed that you are never too old to start learning another language.