Hi Simon - sorry, late to the party to welcome you!
There's always room in a busy life to play your guitar - like Rob I started when I was a kid and could put plenty of time in. Ironically I think I made more progress later on once I started collecting responsibilities.
The really good thing about playing the guitar is that you can go from complete novice to making a reasonable sound quite quickly. Getting to the "blimey, you're good" stage takes a little longer and if I ever reach it I'll let you know!
Plus one on the advice to keep your guitar handy on a stand somewhere - you are much more likely to pick it up and play in a spare five minutes that way.
My tip would be - play with others as soon and as often as you can. Even if you learn a couple of basic chords and are a bit hesitant about changing from one to the other - it's enough to make a bit of simple music with a couple of mates. You'll start feeling like a guitarist in no time and in fact you will be one!
Ask a million questions ten times over if you need to and no-one will mind, especially not on this forum