Where can I change the secondary skills of heroes?

Good afternoon, could you please tell me where to modify secondary and tertiary skills? My current goal is as follows: A) In the secondary skill *Leadership*, there is a tertiary skill called "Treasury Management" which provides 250 gold per day. I want to make it so that it provides 1000 gold per day and can only be learned at level 3 of *Leadership*. That is, you learn Leadership three times, and then you can choose it. This means that to create a hero focused on mining, you will need to spend 4 levels of upgrades. In Heroes 3: Horn of the Abyss, we made this on an expert level, resulting in (+1000 gold per day). I play a lot there too, and I want to say that overall, the skill has become USEFUL, even for the main hero. I would like to update it in Heroes 5. B) Add the tertiary skill "Aura of Speed," which is present in the secondary skill *Leadership*, to Humans, Necromancers, and Dwarves. The other races already have this skill.