Give the macro a name (HTFeral), but don't worry about picking an icon; leave it as default ?
Press the Okay button
Copy and paste the following into the command window:
/cast Healing Touch
Press the Save button (you'll notice that the icon automatically changes to that for Healing Touch
Now open HealBot and go to the Spells section:
Press the ? button next to the where you want to assign the macro
Under the Macros drop-down, select your macro (HTFeral)
Press the Select button next to Macros
Repeat the above steps for your other healing spells.
An issue I'm coming up against is that if you're grouped with, or targeting, lower level players, you may get an error that the target is too low level for your healing spell. Apparently HoTs have minimum level requirements, but direct heals, like Healing Touch, do not so it should work with lower level players.
Another issue is that with Remove Curse and Cure/Abolish Poison macros is that they aren't working on my group bars, only my target bar.
However, for solo play, these macros will work just fine for you and other Druids who come here looking for answers.