I remember joining a group on LJ back in the day called "clucky" - aka broody - it can be incredibly all consuming and that's if you're NT!
What's getting in the way of a baby right now? You mentioned losing weight - well, while this is ideal, it's also not 100% necessary, maybe unless you're so overweight that it would cause dangerous complications in pregnancy? But overweight mothers have babies all the time.
Getting your head in gear - is this about processing trauma, finding the right ADHD medication, getting some systems in place for yourself, anything else? That is probably something that is worth discussing with your therapist. You might also like to read some books? I liked Give Birth Like a Feminist (but wish I hadn't read it while pregnant! - Some distance would have been better.) Taking Charge of Your Fertility is a recommended one for TTC. It Starts With The Egg is supposed to be good too. These are both about understanding the science behind conception. And there's a nice one by Phillippa Perry called The Book You Wish Your Parents Had Read. I might also look at Unconditional Parenting by Alfie Kohn - this is another which is very theoretical, and benefits from some distance. It's a fantastic read, but a frustrating one if you are currently in the thick of wrangling toddlers. There is also a brilliant one called Breastfeeding Myths by Lucy Ruddle which helps sort all the fact from fiction about breastfeeding. (Sorry - is it obvious that parenting books are one of my strong interests?)
Is there anything else that's a problem such as partner, work, education, housing etc?
I think that if there are concrete goals which need to be achieved first then it can be worth writing yourself a timeline for when and how these will happen before you start TTC.
Then bear in mind, when you TTC, it can take anything from about 1-8 cycles to fall pregnant, and about 20% of pregnancies end in miscarriage which would mean a second attempt. (These figures assume typical fertility). So even if you do start TTC, you might not fall pregnant straight away. It's worth thinking about a kind of "baby period" (of 6 months or so, or 12 if you like) and thinking about when that would fit best in your life, rather than saying, right, we're going to do these goals and then have a baby in Winter 2024. And if you want to have more than one child longer term, then it might be worth thinking ahead to that too.
In terms of medication - I didn't know I had ADHD with my first child. I got diagnosed in 2016, had a miscarriage, stupidly(!) told them I was TTC and they then said just forget about the medication until your baby is older, then. Took a further 18 months to conceive a baby that stuck (we have infertility, this isn't typical) and DS2 was born summer 2018, I then went onto medication early 2019. Bumbled along on this for a while and then stopped it in winter 2020 because I was pregnant with DS3. Frustratingly, I was planning to change it just before I stopped taking it, and it's taken me a while to get an appointment with another doctor, so I'm due to have that appointment next month.
So in some ways, if you're trialling medication, it might be useful to have that all done and finished and 6 months or so of knwoing that it works for you before coming off it for pregnancy (you don't have to come off all of them, but some people like to anyway). OTOH, since there are shortages at the moment, because the whole medication process takes such a long time, and because the hormonal and lifestyle changes of pregnancy/small children can also cause changes anyway, in some ways, if you know you're going to have to have a long break for pregnancy, it might make sense to just say I'm going to try medication later on (and perhaps mark your calendar to set yourself an appointment goal for 2025, or something).