Unless you can find some advice tailored to your particular situation, go back to first principles.
Perennial crops (rhubarb, soft fruits, etc) are excluded from the rotation for the obvious reason, though if you replace old perennials with new plants, consider putting them in a different location.
There are five main vegetable groups in the rotation system: Brassicas, Legumes, Onion family, Potatoes and tomatoes, and Root vegetables except those in the first four groups - swedes and turnips are brassicas, for example.
Some vegetables don't need to be included in the rotation, and don't fit into the above groups in any case. You can grow them anywhere convenient, so long as you don't always grow them in the same place. Those include salad crops, cucurbits, sweet corn, and vegetables which are biologically in one of the five groups but in practice don't share the same pests and diseases - e.g. peppers and aubergines (potato family) and French and runner beans (legumes).
For the main rotation, divide your plot into equal sized areas, and allocate one or more of the five groups to each area. You don't need to divide the plot into five areas - for example you might have three equal sized areas, one for potatoes, one for brassicas, and one for the other three groups, depending how much space you need for what you want to grow.
Then, rotate the crops annually around the different areas, so that if you have three areas, you grow a particular crop (e.g. potatoes) in the same place once every three years.
Growing the same type of vegetables twice in one year (in spring and fall) is not too bad, so long as that crop is not grown in the same place again for 3 or more years, depending on the number of plots in your rotation. But obviously if your spring crop has some pest and disease problems (e.g. your spring brassicas get club root), you might want to change your plans rather than blindly planting another crop and hoping it will be OK! You might be able to swap over "rotating" crops and "non-rotating" crops in spring and fall to avoid growing the same type of crop twice in one place - e.g. brassicas and salad crops.