I have to chime in here in support of hand-me-downs and not spending a fortune. All you need first is a moses basket (second hand), plenty of vests and baby-gros (Dunnes and Penneys are fine, and no need to spend more than €50), a buggy (second hand) some blankets (Dunnes/Penneys again), and a car seat. Best to buy a new car seat and have the shop fit it in your car. You will probably get plenty of presents of clothes for dressing up. Don't spend a fortune on the first buggy, bacause you won't be using it for any longer than a year at most. Then, as the other poster said, you can't beat a lightweight Maclaren fold-up. My babies never quite made it into a cot, preferring to sleep in our bed, but that's not for everyone. Consider breast feeding - free, far far better for the baby, no fussing with sterilisers and other paraphanalia, plus you get your figure back in a matter of months, if not weeks. At six months, you'll need a high chair - again, safety and hygiene are the considerations, nothing else. Nappies are a significant expense, but worth it obviously
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I'm an older mum because I just wasn't ready when I was younger, but you seem to be ready and I'd agree it's better for both children and parents to have them younger. Don't let money put you off. But equally, I'd say, after a few years get back to part-time work, for your sanity, independence, and your own money to spend. Perhaps you and a friend could cover the childcare for each other if you both work part time at different times, for instance. Staying at home full time can be quite isolating. And, God forbid anything should happen, you need to be able to support yourself.
PS You can buy a second-hand cot or use a hand-me-down if you can get one, but do buy a new mattress.