Haven't spent a whole lot of time looking at it, but I think it would be easiest to just change the damage dealt to something you can manage rather than making them passive. In 1.15.9, assets/survival/entities/land/wolf-female.json line 123 says,
[code]damage: 8,[/code]
I have not tested it, but seems to me dropping that to 1 or 2 would make it much more survivable, and teach you how to battle them. For my part, I don't find them much of a challenge unless I'm still completely naked, and in that case, I can usually outrun them, and definitely outswim them.
Note, you would also have to change the appropriate line in wolf-male.json.
Oh, since you have never done modding, be sure to save a copy of the files first so you can undo things if they don't work out...