1.
If you have a seal, you can directly go online to find the map of the seal, download the resources, put the words on it, make the font white, and then adjust the position.
2.
You can also use the above picture directly, and use the red brush in ps to erase the white words and type them in.
I don't know if I understand, but I actually use
coreldraw
(Drawing software) can also be done, vector diagram.