I'm sorry to hear you've been diagnosed so young. I was diagnosed last year with HER2 just as I turned 35. I had EC x3 then Docetaxol with perjeta and herceptin x4 cycles.
Yes, everyone is different, so it's best to just see how it goes, keep a note of your symptoms (if you get any) and take your Nurses' advice. I'd only say that with EC, take your anti-sickness meds after! I didn't, and had an awful bout of vomiting in the evening. For the rest of that cycle and the following ones I took them per the instructions and didn't feel any side-effects (apart from constipation caused by the anti-sickness, but they'll give you laxatives for that). Other than that, I had some tiredness which accumulated (was in bed by 8:30 p.m. for the first week after each cycle), but that was it.
I found the emotinal side affected me more than any physical side-effect. The Breastcancernow forums have monthly chemo threads you can follow- i.e. those started/starting chemo in June etc. who discuss their symptoms and general wellbeing. I didn't join but followed the conversations each day and it made me feel less alone. Instagram is also full of very inspiring women documenting their journey (search breastcancerunder40), and they're the ones who kept me smiling through it all - especially the ones with children who saw their chemo days as 'spa/relaxing days away from the children' and posted amusing stories- it's a really lovely community on there (although you may not want reminders of BC, so do look after yourself throughout).
I remember feeling so overhwhelmed thinking about the mountain it appears to be when starting, but it honestly goes by so quickly. You'll be at the surgery stage in no time. All the best. X