Have I understood this correctly?
I'm playing as a barbarian wielding a 2-handed weapon
I can take assurance medicine at 2nd level, which assures a 100% treat wounds success after 3rd level (10+2 for trained proficiency + 3 from level= 15; the basic DC for treat wounds).
Battle medicine at 4th level (which doesn't state that I need a hand free, just that I need to wear healers tools).
So I could heal myself for 2d8 HP once per day mid fight with a single action while raging and wielding a 2-handed weapon?