Best to start with white sourdough then move on to the wholegrain loaves once you’ve mastered it. Much easier to learn to make sourdough this way. Remember it’s a living thing, with a personality. If the jet stream changes position then your sourdough will likely act differently too… Always consult the weather forecast to get an idea of the potential mood of your dough.
If you’re someone who likes things that work by the book then sourdough is not for you. Buy it instead! But if you’re creative and enjoy difference you will love and cherish making this bread. One thing is certain, you will have some failures! Keep on at it cos when that perfect loaf comes out of the oven your heart will jump for joy!