Amazing ! Sounds like you caught it really early that’s fab!
I have ILC (invasive lobular carcinoma). Mines a bit further along then yours, one lymph node involved and I had a full mastectomy and axillary clearance straight up.
You could ask your breast nurse if there’s any other young mums who have commenced treatment who might be happy to connect and offer advice, mine did that for me after getting both of our permissions for numbers to be shared.
Best of luck to you! And ask lots on here, everyone is so supportive and helpful.