Wow, sorry you're having such a rough time. Transitioning from one food stage to the next is on an "as tolerated" basis. Your stomach may still be too swollen to handle the pureed foods. That's not a mistake you're making, it's just your individual situation. So long as you get adequate liquids and protein, don't worry if you transition more slowly than others. And if you can only handle 1/2 a tablespoon, so be it.
It's so hard not to compare yourself to others, but you're unique! Comparisons aren't "real". When you read various people's stories, you realize that there's no consensus even among doctors as to an "ideal" time to transition, either. Some doctors are very conservative, others push faster. In the end, it all comes down to what you can handle. Be kind to yourself. You've done some really mean stuff to your insides, and they just need time to adjust.