I am not the same boat as your, couple of years younger and recently started with php. Well I am not there yet, one month in to my serious attempt (I have tried several time not-too-seriously), I can say and feel that its definitely possible to learn to code in a single language in a reasonable time.

I think it boils down to your attitude towards it and how much you are motivated to learning. I spend only about 1-2 hours every other day. One of the mistakes I made was trying to decide which language to learn first, I would say it matter very little; the reason I decided to try PHP (despite having many naysayers), because of huge size of its community, easy access to free materials on the web and get any kind of help I want to and also because how relatively easy it is to learn PHP. I also looked in to other programming languages a bit (code snippets) and general impression I get is that once you have a good understanding of one programming language its very easy to pick up other programming language (yes, even with php), because despite its differences the general idea behind most programming language is the same.

I would also spend a week or so to learn git/github even if your are coding by yourself and learning very rudimentary stuff.

I would say go for it, stop wasting time deciding which language to learn, pick one and jump to it.