It's pretty easy, you click on your hero, open their character window, alt-tab out of the game and go to the editor, change skill points and level to what ever you want (I go for 70 in each), go back into the game, close the hero screen and re-open it and you will see your skill points.
Pretty much the same thing with Surplus, click on the city, alt+tab, go to editor and change the value, go back to the game and click away from your city and then click it again and the surplus will change. I did find that if you change it 20 (for example) and upgrade your city to level 4, the next turn I didn't have 16 surplus left I had 3 so I just had to do the same process again.
Hope that helps.
[Edited by Corralis, 5/23/2020 6:40:03 AM]
There can be only one!!!!😁