Hi OP, my twins were born at 35+0, should've been 34+5 but no space.
Boy was 1.6kg and girl 4lbs 15oz, sorry for mixed economy but that is how I always remember their weights!
Neither needed help breathing although DS was born blue and needed resus - but thereafter, no vent.
Both had trouble maintaining temp and too weak to digest milk so were fed on some type of dextrose solution first, then BM and special hi-cal formula in a naso gastric (NG) tube.
In NICU for 2 w, then out with support from a special nursing team that visited the house every 24,-48h at first, moving to 48-72h after a fortnight or so. This kept up for around 6-7w, then they were strong enough to go outside.
Some things I was not prepared for -
Zero postnatal support. This was pre pandemic. This was bc the special nursing team were there instead of the usual HV team but obviously they were neonatal nurses so had no maternal support role. The twins could not leave the house as not strong enough and needed an adult who knew infant resus/how to sort their tubes at all times - so I couldn't go out to the GP. This meant literally no help with anything, i.e. stitches suspected infection etc. You might suss out what it's like where you are.
You often cannot hold prem babies as holding them stresses them. I could only hold mine after they were about a week old and then only to feed.
Even if they are small and have NG tubes they may learn to BF if that matters to you. Mine went from dextrose solution to NG tube to bottle fed to mixed bottle and BFing. We BF till almost a year.
You may need to be assertive with "regular" medical professionals ie the ones you see after the NICU. For example many don't know how to plot a growth chart for a premie baby or may advise you to do things early if they are not correcting the baby's age rightly.
My twins had a rough start - as well as the above they caught chicken pox at 5w old and had to be re-hospitalised - but today they are nearly four. That tiny boy is a strong, lively preschooler who loves maths and his sister is a fearless little scrapper. You will get there 