I'm not sure what your level of experience is, but I see few potential problems if that's your main source of information:
- oils and potassium hydroxide should be measured by weight, not by volume
- usually there's a neutralization stage involved which is missing from the explanation. Even if you plan to skip it, you should know what it does.
- you should have some accurate means for testing the pH of the resulted soap
- if you aim for a clear, transparent soap, you'll need to research more into that topic
- 15 minutes of continuous blending will burn many blenders
There is also very little information on topics such as safely handling the lye, the "trace" concept, etc.