Firstly, remember that the baby you have now will change. You get many iterations of your child through time. The potato baby, the mobile baby, the toddler, the preschooler etc. Mine are 6 and 8 and many of the challenges we had a year ago disappeared with time, to be replaced with new ones, this will no doubt in time go and be replaced with others!
And as children change, motherhood changes, sometimes for the easier, sometimes for the harder, it depends what stages you gel with and your life circumstances.
So how you feel now may be completely different from how you feel in 6 months or a year.
But how did you get through the time now? Honestly you just fake it to an extent, carry on, get support where you can, and let the tides of time pull you back up (with a bit of help if needs be).
What do you mean by 'the mum lifestyle' by the way? There are so many ways to mother, that there's not just one lifestyle. Yes, there are things in common, like babies cry, toddlers tantrum, and older kids never stop calling 'muuuuumy' for a long time, but places you go, the rules you have, the strategies you use, they are totally up to you. It might not feel it, but you have reasonable freedom to do what you want now, because your baby is not mobile, and basically only wants you no matter where you are. So you can take them to the cinema (baby showings), put them in a sling and go shopping, go away for a few days, do life your way, just with a baby. If you've got a partner, then you can share the parenting, and take breaks!
You can do this.