What is the best was to eat if I just had a tracheotomy?

Soft, not liquid. Start with soft foods, and get used to that. You are less likely to aspirate with soft, than with thin liquids. You can build up to a normal diet over time.Tr.
Swallow evaluation. A speech therapist should perform a swallow evaluation to be sure you're ready to eat. Then make sure you are sitting up and try small amounts at first. Take time to fully swallow between bites.