I'd suggest keeping an open mind on how it all goes and see how you and your baby feel at the time.
Hopefully as you've been so surrounded by it BFing will work out well for you.
It certainly did for us, DD is just stopping now at 28 months. I went back to work 4 days a week when she was 7 months.
I think seeing if you can introduce a bottle or cup early is a good idea but bear in mind that a lot of exclusively breastfed babies won't take to either for a while. I can think of lots of friends getting very stressed as they tried to do exactly what you have in mind: introduce a cup or bottle from about 4 months so their baby was used to it. Some of them just won't play ball for quite a long time. So don't let that freak you out, if that happens.
We introduced a bottle (expressed milk only) far earlier than is recommended (2 weeks) the upside of this for us was that DD was reasonably comfortable with it throughout. Although it was a faff I made sure she was offered a bottle every couple of days, whether she took it or not (never tried to force her).
So she was ok on that. Then I expressed for her at work while I went back, I thought it would just be for a few weeks, but actually I did it until she was 1yr (so 5 months). Once I got into the swing of it I found it manageable, and our nanny reported that having EBM seemed to really support and soothe DD while I was at work.
And carry on had great benefits: the connection / reconnection we got especially when I got home from work has been really brilliant. During the first year its easy to think breast feeding is all about nutrition, but her first birthday I could really see how important the emotional connection it maintained supported DD.
We've had very little of separation anxiety, crying as I leave that lots of Mums going back to work find, and as toddler's go she is a dream, despite a strong personality and sense of self.
She would feed when I got home, and bedtime and morning. We've gradually cut down on those feeds as she's got older, usually as she started to drop them herself, so now its just one quick feed at bedtime.
So all I wanted to say is, yes, great to plan. But also be open to things not going to plan, and in particular to making choices that best reflect what you and your baby want and need, rather than arbitrary deadlines.