Better get started if you don't want to miss the next season. Start with the soil amendment project you had in mind. This clay, even though I have all colours of it, Sharon did you know there are different clays also? I hate clay, keep dumping sand into it and have been dumping sand now for three years. If the yard is big enough and if it rains heavy, you may need drainage channels to get the water out as fast as possible. If it is water logged, then look for a water hungry tree. There are quite a few of those also. I don't think it is water logged though. This sticky plasticky clay does not absorb water readily, if this is true then you may need a soak pit in order to improve the water/moisture level. It will take a while before you reach the planting stage, so start the project.
Regards,
Arif.