Congratulations and you have my sympathies with the HG I suffered in my last pregnancy and its awful!
Don't be scared by all the lists you find online, most of the stuff is pointleas or can be bought afterwards rather than having all pre prepared. With my first I went all out and bight everythng I was told I'd need but with my second I learnt my lesson :o
A good start method is:
Somewhere to sleep - moses basket/crib/cot or cotbed, 2-3 sheets, matress, 2 cellular blankets.
Something to eat - 6 bottles, steriliser and a tub of formula
Someway to travel - group 0 car seat, pushchair/pram which lays flat, pram raincover and cosytose, slings can also be useful.
Something to wear - 6-8 babygro's, 6-8 vests, 2 cardigans, pramsuit, hat and 2-3 pairs scratchmitts.
Anything else is optional to start with. You'll feet loads of gifts (normally clothing) so wait and see what you need afterwards.
I added a baby swing at around 4 weeks and a play gym around 3 months.
A baby bath is useful but not essential, personally I like the bath sports which sorry if hold the baby for you as its less strain.
0-6 weeks