Oh dear god, just seen my typo 
There is nothing sexual or remotely amusing about baby led weaning in the early days 
I’m so sorry.
Anyway, I’m glad to have helped a little. Even if it’s just so you know you’re not alone and that someone can tell you what a great job you’re doing. After a CS which I know isn’t fun, I had one, and with a dinky baby you’ve been lucky but also fantastic and he’s obviously thriving and that’s all down to you!
It can take so much out of you and some days it feels never ending so tbh, given how quickly things change, if you can just give yourself over to feeding as and when he needs for now that might help. When are you going back to work? Unless it’s very soon I’d try not to worry about it just yet. He’s in a period of immense change and growth at the moment. Learning and exploring constantly is so tiring for babies and you’re his safe place, not just food, water and snacks but comfort and soothing and a piece of home.
Does he have a dummy? DD has always been very windy and I eventually found a dummy which she loved after spending so long with her sucking on my little finger it went numb. The tommee tippy breastlike soother I think it’s called. Softer than normal dummies so better for bf babies. Might be worth a go if you’re happy for him to have one and he doesn’t at the moment. They’re not for everyone but I think they’re brilliant.
On the weaning front, I can’t tell you how disappointed I was at how bloody stressful it was when the normal narrative is how great and exciting it is. Especially if you’re bf and used to just popping them on anywhere and everywhere with only a muslin to hand, the high chair, bibs, trying to work out what to give them is just a massive ball ache! I tried to stop stressing a week or so in and just gave her a crust of bread and a stick of cucumber to gum on. She loved both and we went from there. Bits from my plate, loads of chunks of fruit and raw or steamed veg, bits of plain pasta, chunks of cheese (we’re veggie) and kept trying things she didn’t like and giving her more of what she did. Bibs with arms were a lifesaver. Cleaning up before things congealed and got even grosser helped! There’s no rush. He’s getting everything he needs from you and will do for a while so anything else is a bonus and an experience in texture, feel in his little hands, different tastes. The more you give him bits from your own food prep or meals the less time you’ll have to spend coming up with ideas. Sit with him and chat about what he’s got in front of him, make it as fun as you can. Don’t beat yourself up if it’s less fun and more faff, I bet loads of people feel like that and don’t talk about it.
Try any sort of cup you think he’ll like. We went through 7, yes 7, before finding one DD would use. He’s getting plenty of help with healthy development, he also doesn’t need water yet but if you want to keep trying then trust your gut and find whatever works.
It’s hard not to compare with other mums and babies but you know your son and what he needs, you’re giving him so much support and comfort and love. It doesn’t feel like it when you’re in the trenches but this will go so so fast and no one ever looked back and wished they’d cuddled or fed their baby less.