I haven’t read the whole thread, but thinking of you. Having a baby is such a shock to the system
A lot of people have given a lot of advice. Here’s some stuff that helped me:
Baby almost never cried in the sling. It was only when we left the sling behind on a trip to parents and ended up using a borrowed pram for a week that he started really crying. YMMV, but I loved throwing on the sling and having him snuggled to my front. I could go anywhere- and did - the warmth, tightness and probably my heartbeat kept him calm. It helped our bond, too. I had a large wraparound one that was surprisingly easy to put on - even alone.
I bf, but used a carton of formula if DH was doing a night and I couldn’t express enough. A friend used to bf but take formula when she went out as she wasn’t comfortable bfing in public. I don’t think formula/bf affects sleep, but many mothers do mixed feeding with no issues. We had single serve cartons of formula.
If baby cries out and about, you‘d be surprised how many helpful people there are around. I had engineers making faces at baby DS to distract him, and a waiter who carried him around while I was eating and showed him all the mirrors in the restaurant. A lady from an OAP coffee morning I went to who walked around with him for ages. Pensioners‘ groups are fab - they’ve been through it long enough ago, many actively want to help with baby.
I found if I got feeding on a schedule, this made sleep follow a schedule, too. Got that from a French parenting book btw.
It helps to have an idea of what’s going on in that little head. I found Wonder Weeks excellent, an app based on a Dutch book roughly translated as Oh, I‘m growing! There are huge brain developments happening at certain times in the first year or so, and with each one baby can get clingy and fractious as his world has just changed - again. The app warns you when this is due to happen, what is happening, and what may help.
Don‘t be scared to try different ways of doing things. I hated breastfeeding for the first six weeks, a Google search for I hate breastfeeding turned up a technique called relaxed breastfeeding, which essentially involved baby facing the boob while I lay down. I was feeding him one-handed standing up after a while.
A friend used to take her son out to the city art gallery in his buggy until he was at least 3. She‘d push him around, he‘d fall asleep, she enjoyed the extensive art collection.
Each child is different, but try unorthodox ways of doing things and make it work for you. Also don’t be scared of going back to France - childcare is much cheaper and more plentiful there. Babies don’t need much space for the first year.
And it does get easier, then harder, then easier, until you discover you‘ve become attuned to your little human. It’s a very very different life, but you will catch yourself enjoying an experience you would never have had without your child and feel some joy. As they grow, they will introduce you to things you wouldn’t have experienced without them (my 9yr old and I swam 1km today!)
All the best, one day at a time.